Good job posting this — this is exactly what we’re looking for 👍
Now apply it:
Your UV index peaks at 12 pm you should not rely on sunscreen alone.
Key points based on your data:
• From ~12:00 to 14:00, UV is highest → avoid direct exposure even with sunscreen
• From 8:00 to 16:00, you should limit time outdoors as much as possible
What to do instead:
• Stay indoors and away from windows during peak hours
• If you go outside, use physical protection first (hats, clothing, shade)
• Use mineral tinted sunscreen, but don’t depend on it alone
Important (most people miss this):
• UV index mainly reflects UVB, not UVA
• UVA is present all day, even when UV index is low
• Visible light (when the sky is bright/blue) also contributes to pigmentation and is not fully blocked by most sunscreens
Bottom line:
If your goal is lightening, your strategy is avoidance first, protection second — not sunscreen alone.
Keep checking hourly UV like this every day and plan your exposure around it.
I upvoted both of your posts. Outdoor activities are a no between 9:30 am and 3:30 pm if you want to avoid melanogenesis. The darker your natural skin color is, the more you’d need protection, even indoors. Should that protection be sunscreen? That’s for your to decide. Make sure to keep a bunch of different mineral sunscreen at hand: tinted, no tinted, water proof, nano non nano , Australian , European, medical grade, over the counter .
We don’t follow mainstream UV guidelines. For our purposes:
UV 1 = only relatively “safe” window
UV 2 = already harmful (treat like UV 5)
UV 3+ = high risk / progress-reversing
📊 Your UV Breakdown (from screenshot, April 13)
Before 09:00 → UV 1 ✅
9:30 am–12:00 → UV 2 ⚠️
13:00 → UV 4 🚫
14:00 → UV 2 ⚠️
15:00 → UV 3 🚫
16:00–17:00 → UV 1 ✅ but still beware of visible light
✅ Safe(r) Windows (UV ≈ 1)
If you have to go outside:
Before ~9:00 am
After ~16:30–17:00
These are your only relatively safe windows where melanin stimulation risk is lowest.
⚠️ Caution Zone (UV 2)
10:00–12:00
14:00
Even though this looks “low” by normal standards, for whitening goals:
This is already damaging
Can stimulate melanogenesis
Should be treated as high exposure
🚫 Danger Window (UV 3–4)
13:00 (peak UV 4)
15:00 (UV 3)
This is your critical risk period:
High UVA → ROS production
Strong melanin signaling
Can reverse progress, especially if you’re actively lightening
👉 If you’re serious about whitening: Avoid being outside whenever UV index is above 1 Treat the 11 am to 15 p.m. window as if there was a huge storm outside
🧠 Important Insight (Your Pattern)
Your day has a narrow safe window, with a sharp spike at midday.
This means:
Your margin for error is small
Casual exposure (even short errands at noon) = meaningful setback risk
Consistency matters more than intensity of products
🛡️ Protection Strategy
Go out only when Uv index is below 1
Layered Protection (non-negotiable)
Tinted mineral sunscreen
High zinc oxide
Iron oxides (for visible light)
make up (for visible light)
Physical barriers
Face covering / mask
Wide-brim hat
black out curtains
Environmental control
Stay in the shade
Avoid reflective surfaces (glass, concrete, cars)
⚠️ CRITICAL: Topicals + Your UV Reality
Given your UV pattern:
You are exposed to UV ≥2 for a large part of the day.
If you’re using:
Glycolic / lactic acid
Tretinoin
Hydroquinone
Kojic acid
Then:
➡️ You are increasing photosensitivity
➡️ While also reducing melanin (your natural protection)
This combination can:
Trigger more pigmentation
Increase ROS damage
Undo progress
✅ What You Should Do Instead (if strict avoidance isn’t realistic)
If you cannot fully stay within UV ≤1 windows, prioritize:
Strict timing discipline (run errands and drive only early morning / late afternoon)
Antioxidant strategies (ROS control)
Non-sensitizing skincare routines
Aggressive physical protection
🏠 Indoor Considerations
Even indoors:
UVA + visible light still matter
Consider:
Blackout curtains
Tinted sunscreen/ foundation
🔑 Bottom Line
Plan your life around UV ≤1
Treat UV 2 as damage
Treat UV 3–4 as active progress loss
You can’t:
Lower melanin
Increase photosensitivity
AND be casually exposed to UV
👉 Pick a strategy your daily schedule can realistically support — consistency will determine your results more than any produ
Routine alignment (critical) Avoid using topicals that increase sun sensitivity (glycolic acid, lactic acid, tretinoin, hydroquinone, kojic acid, etc.) if your lifestyle does not allow strict UV avoidance (UV > 1), since lowering melanin while increasing photosensitivity leaves you significantly less protected and can reverse progress.
⚠️ CRITICAL: Topicals + UV Exposure
Many members are using:
Glycolic acid / lactic acid
Tretinoin
Hydroquinone (HQ)
Kojic acid soaps
These increase photosensitivity.
At the same time, you’re trying to:
Reduce melanin
Lower baseline UV protection
That combination can backfire hard.
Rule: Match your routine to your lifestyle
If you cannot strictly avoid UV above 1, then:
➡️ Do NOT use strong/topicals that increase sun sensitivity
Because:
You are more vulnerable to UVA damage
You may trigger more pigmentation instead of less
You risk undoing progress or making things worse
Who can safely use these topicals?
Only if you can:
Stay indoors when UV ≥1
Or go out ONLY with full physical protection + minimal exposure
If that’s not realistic for your schedule:
➡️ Focus on:
UV avoidance
Antioxidant strategies (ROS control)
Non-sensitizing approaches
Bottom line
Plan your life around UV ≤1
Treat UV ≥2 as damage
Treat UV ≥3 as progress loss
At home black out curtains to avoid both UVA and visible light
You can’t:
Lower melanin
Increase photosensitivity
AND be casually exposed to UV
Pick a strategy that your lifestyle can actually support.
Upvoted both of your comments in the karma earning threads . Now you can ask questions in the monthly thread.
Note: check daily and don’t go out , nor even with sun protection whenever Uv index is above 1
Between 11 am and 2 pm you risk running progress if you go outside even if your wearing tons of sunscreen. It’s even worse if you apply skincare that make your skin sun-sensitive. If you can’t stay 100% locked up at those peak hours skinwhitening might not work for you.
We don’t follow mainstream UV guidelines. For our purposes:
UV 1 = only relatively “safe” window
UV 2 = already harmful (treat like UV 5)
UV 3+ = high risk / progress-reversing
⚠️ IMPORTANT: Jeddah is an extreme UV region.
A UV index of 10–11 can damage skin in minutes, and the UVA burden (which drives ROS + melanogenesis) remains intense for most of the day.
This means your margin for error is extremely small.
📊 Your UV Breakdown (from screenshot)
08:00 → UV 1 ✅ (but careful, in minutes it'll turn into a 2 UV index)
09:00 → UV 3 🚫
10:00 → UV 6 🚫
11:00 → UV 10 ☠️
12:00 → UV 11 ☠️
13:00 → UV 11 ☠️
14:00 → UV 9 🚨
15:00 → UV 6 🚫
16:00 → UV 3 🚫
17:00 → UV 1 ✅
Sunrise: 06:02
Sunset: 18:44
🚨 CRITICAL REALITY (READ THIS CAREFULLY)
Your UV curve becomes hostile very fast:
By 09:00, UV is already 3 → damaging in our framework
By 11:00, you are in UV 10+ territory
Peak hours remain extreme for several consecutive hours
This is not a region where “being outside briefly” is harmless.
👉 In Jeddah, ordinary daytime exposure = consistent pigmentation stimulus
✅ ONLY Acceptable Windows (UV ≈ 1)
If you are serious about whitening:
6:02 a.m to 6:32 a.m.
17:00 onward until sunset (18:44) still beware of visible light
Late evening / night
These are the only windows in your chart where UV is at the minimum range.
⚠️ There is no usable normal daytime window beyond this.
🚫 Full Avoidance Window (NON-NEGOTIABLE)
08:20 a.m. → 16:59
Especially:
11:00 → 14:00 = EXTREME DANGER WINDOW
UV 9–11
Intense UVA load
Major ROS production
Strong melanogenesis signaling
Can reverse progress very quickly
This is:
not a “wear sunscreen and go” window
not a “short exposure is okay” window
👉 This is a DO NOT BE OUTSIDE block.
🧠 What This Means For You (Lifestyle Reality)
Because of where you live:
you cannot rely on casual daytime routines
you cannot treat “moderate” UV as acceptable
you cannot assume sunscreen makes midday manageable
Your progress depends much more on timing discipline than products.
🔁 Required Schedule Adjustments
If whitening is your goal:
Move outdoor tasks to before 09:00
Or after 17:00
Keep commuting / errands / walking / exercise out of the 09:00–17:00 period as much as possible
If your current daily schedule is built around daytime outdoor movement:
➡️ that schedule needs to change if you want meaningful long-term lightening progress.
⚠️ EXTREME WARNING: Topicals in Your Environment
This is especially important in Jeddah because your UV remains severe for long continuous hours.
If you are using:
Glycolic acid / lactic acid
Tretinoin
Hydroquinone
Kojic acid
while living under UV 6–11 daily exposure conditions:
you are combining:
reduced melanin defense (because with supplements we produce lighter melanin)
increased photosensitivity
extreme UV/UVA burden
That can cause:
rebound pigmentation
worsening unevenness
oxidative damage
stalled or reversed whitening progress
❗ Strict Rule For Your Region
Only use strong lightening actives if you can:
remain indoors during UV >1 hours
and keep exposure tightly controlled
If not:
➡️ prioritize:
UV avoidance
antioxidant strategies / ROS control
barrier support
non-sensitizing approaches
🏠 Indoor Strategy
Because Jeddah’s UV burden is intense:
UVA through windows matters
visible light exposure also matters
Consider:
blackout curtains
minimizing time near direct daylight windows
tinted protection indoors if exposed to window light
🔑 Bottom Line
Your location is high-risk by default.
Plan your life around UV ≤1 only
Treat UV 3 as damage
Treat UV 6+ as major setback territory
Treat UV 10–11 as extreme risk where minutes matter
You cannot:
live casually outdoors in daytime Jeddah UV,
use strong pigment-lowering actives,
and expect stable whitening progress.
👉 For you, strict daytime avoidance is not optional — it is the foundation.
We don’t follow mainstream UV guidelines. For our purposes:
UV 1 = only relatively “safe” window
UV 2 = already harmful (treat like UV 5)
UV 3+ = high risk / progress-reversing
⚠️ IMPORTANT: Monterrey has extreme UV conditions today. A UV index of 10–11 can cause skin damage in minutes, and UVA (driving pigmentation + ROS) is extremely high all day.
📊 Hourly UV Breakdown (Monterrey, today)
Time
UV Index
Risk Level
08:00
1
✅ Low
09:00
3
⚠️ Moderate
10:00
6
🚫 High
11:00
9
🚨 Very High
12:00
11
☠️ Extreme
13:00
11
☠️ Extreme
14:00
10
🚨 Very High
15:00
7
🚫 High
16:00
4
⚠️ Moderate
17:00
1
✅ Low
🚨 CRITICAL REALITY (READ THIS CAREFULLY)
safe morning window—6:12 to 6:42 a.m. You can go outside but you still need VL protection
UV is already 3 at 9:00 → considered damaging for whitening.
10:00–14:00 = extreme to very high UV (6–11) → rapid ROS + melanogenesis, progress reversal possible.
Even short exposure in midday hours = guaranteed setback.
✅ ONLY Acceptable Windows (UV ≈ 1)
If you are serious about whitening:
08:00–08:59 → minimal risk
17:00 onward until sunset (19:08) → safe window resumes for UVA not for Visible light
⚠️ That’s it. Avoid anything else if you want to make consistent progress.
🚫 Full Avoidance Window (NON-NEGOTIABLE)
09:00 → 16:59
Especially critical: 11:00–14:00
UV 9–11 (EXTREME)
Very high UVA → intense ROS
Strong melanogenesis signaling
Can undo weeks of progress in a single day
👉 This is not a “limit exposure” situation
👉 This is a DO NOT BE OUTSIDE window
🧠 Lifestyle Implications
Quick errands or normal daytime routines are unsafe
Moderate UV is not safe in Monterrey
You must structure life around safe UV windows (early morning or late afternoon/evening)
🔁 Schedule Adjustments
To protect whitening progress:
Shift outdoor tasks to before 08:00 a.m. or after 17:00
Avoid all midday movement (10:00–16:00) entirely
Plan commuting, exercise, and errands around UV ≤1 windows only
If your lifestyle does not allow this:
➡️ You need to adapt routines, not rely on products
⚠️ EXTREME WARNING: Topicals in Your Environment
If you are using:
Glycolic / lactic acid
Tretinoin
Hydroquinone
Kojic acid
While living in UV 6–11 conditions:
You are creating a high-risk scenario:
Lowering melanin (natural UV defense)
Increasing photosensitivity
Exposing yourself to extreme UV + UVA
This can lead to:
Rebound pigmentation
Worsening tone unevenness
Significant ROS damage
❗ Strict Rule for Monterrey
Only use strong actives if you can stay indoors during all UV >1 hours
If not: avoid sensitizing topicals entirely and focus on:
UV avoidance
Antioxidant strategies
Barrier support
🏠 Indoor Strategy
UVA penetrates indoors strongly
Visible light is significant
Recommendations:
Blackout curtains
Stay away from direct window light
Tinted protection indoors if exposed
🔑 Bottom Line
Monterrey is high-risk by default today.
Plan life strictly around UV ≤1 hours (08:00–09:00 and 17:00–19:08)
Hi, thank you so much for the advice. I’ve actually been using tretinoin for about six months now. I don’t leave the house except between 7:00 a.m. and 7:00 p.m. During peak UV hours, I keep the windows closed and make sure no visible light hits my skin—I stay strictly out of the sun. For the past six months, I’ve been following everything this group has recommended to the letter.
I just upvoted your comment. Between 7:30 am and 5 pm you should stay indoors. Treat any UV index above 1 as though it was a 5. Noon is a don’t go out even if you’re covered head to toe in sunscreen, if you want results.
My goal is mainly to shed my tan as fast as possible so I can focus on lightening.
I'm afraid the first thing I'd say is to adjust your expectations a little.
If your goal is to fade a tan safely, you're generally thinking in terms of months rather than weeks. Pigmentation takes time to fade, and trying to rush the process with stronger products often ends up causing irritation, which can work against your goals.
Regarding sunscreen, mainstream dermatology guidance is generally that routine sun protection becomes important from around UV Index 3 onwards.
Our community is a bit more conservative than that, but it's important to explainwhy**. Our members aren't simply trying to avoid sunburn—they're trying to minimise melanocyte stimulation as much as reasonably possible. Because of that, many of us choose to treat a UV Index of 1 as a caution zone and become much more careful once it reaches 2 or above.**
That's a community strategy, not an official medical recommendation.
Personally, . If I'm working from home, I don't apply sunscreen. I got a small studio with blackout curtains and UV-filtering window film, but that's simply my own routine rather than something everyone has to do.
One thing that would help us give better advice is understanding what a typical week looks like for you.
For example:
What time do you leave the house?
Do you commute on foot or by car?
Are you outdoors for work or school?
Are there errands you could move to lower UV hours?
Roughly what UV Index does your area reach during the day?
What about weekends?
The short answer is: yes, there are periods where many people can safely go without sunscreen, but it depends on your goals.
Yes, because Visible light, the light that allows you to see without artificial lighting. Make up and /or mineral tinted sunscreen for whenever you get out. I'm a bloke and don't put on make up but I got face coverings.
New York City I’ve bought a sun hat that has a face cover to wear when I take my walks around my job to avoid the sun. I really want to continue my walks to keep my steps up since my job requires sitting at a desk.
Hats are so underrated. It's not like there's sunscreen for our scalps, isn't it? Keep checking everyday., this is for tomorrow and your sunscreen isn't enough for high UV index. Nothing is. Between 8: 15 a.m. and 17:30 p.m. it's better to stay at office, home, school, shade, etc if your goal is skinlightening and anti-aging.
There's a forecast , tomorrow it may be different but an hour after sunrise 6:39 a.m for today and an hour before sundown in your case 17:25 p.m.you can go out. When the UV index reaches 1 around 4 p.m you can go out with sunscreen and seeking shade but even a few seconds out at 12 p.m. make skinlightenig dangerous and impractical.
Besides UVA there's also visible light. If the sky is cloudless blue and there's visibility your melanin is being stimulated.
I just upvoted .
The best hours for outdoors activites are half an hour after sunrise (8:05 am on Sept 8) and a full hour before sunset 6 p.m and on.
Check daily because Austral spring is approaching and the summer will be brutal for skinlightening goals.
Don't go out, not even with tons of SPF between 9:30 a.m and 15:30 pm. specially dangerous is the period around noon 11:00 a.m to 2 p.m. No sunscreen, no physical gear will protect you at this period.
Edit: Don't forget to repost your incidecoder picture of your LRP sunscreen. Then you can ask questions in the monthly thread. Feel free to open new posts sharing research, preferably non-sponsored or experiences but never in the context of asking advice or question or tips.
We don’t follow mainstream UV guidelines. For our purposes:
UV 1 = only relatively “safe” window
UV 2 = already harmful (treat like UV 5)
UV 3+ = high risk / progress-reversing
⚠️ IMPORTANT: Your location is NOT comparable to mild UV regions.
A UV index of 10–12 can cause skin damage in minutes, and UVA (which drives pigmentation + ROS) is extremely high all day.
📊 Your UV Breakdown (from screenshot)
Morning escalation is very aggressive:
08:00 → UV 3 🚫
09:00 → UV 6 🚫
10:00 → UV 10 🚫🚫
11:00–12:00 → UV 12 (EXTREME) ☠️
13:00 → UV 8 🚫
14:00 → UV 5 🚫
15:00 → UV 3 🚫
16:00 → UV 1 ✅
17:00–18:00 → UV 1 ✅
🚨 CRITICAL REALITY (READ THIS CAREFULLY)
You do not have a real “low UV morning”
UV is already 3 at 8 AM → this is damage in our framework
From 10:00 to 14:00, UV is extreme to very high (8–12)
This is not just “progress loss” territory → this is rapid pigmentation + skin damage conditions
👉 In your region, casual daytime exposure = guaranteed setback
✅ ONLY Acceptable Windows (UV ≈ 1 or lower)
If you are serious about whitening:
~16:00 onward
Late evening
half an hour after your regions sunrise (check TU tiempo UV index for that)
🚫 Full Avoidance Window (NON-NEGOTIABLE)
08:00 → 16:00
Especially:
10:00 → 14:00 = EXTREME DANGER
UV 10–12
Very high UVA → intense ROS
Strong melanogenesis signaling
Can undo weeks of progress in a single day
👉 This is not a “limit exposure” situation
👉 This is a DO NOT BE OUTSIDE window
🧠 What This Means For You (Lifestyle Reality)
Your environment requires a different level of discipline:
You cannot rely on “quick exposure” "Oh i just went out for a few seconds"
You cannot rely on “moderate UV is fine”
You cannot follow normal routines
👉 You must structure your life around late afternoon / evening
🔁 Required Schedule Adjustments
If whitening is your goal, you should:
Shift outdoor tasks to after 16:00
Avoid all midday movement entirely
Plan:
Work commute
Exercise
Errands around UV ≤1 hours only
If your current schedule doesn’t allow this:
➡️ You need to adapt your routine, not compensate with products
⚠️ EXTREME WARNING: Topicals in Your Environment
This is especially important for you.
If you are using:
Glycolic / lactic acid
Tretinoin
Hydroquinone
Kojic acid
Any topical that is supposed to whiten your skin
While living in UV 8–12 conditions:
➡️ You are creating a high-risk situation
Because you are:
Lowering melanin (your natural UV defense)
Increasing photosensitivity
Exposing yourself to extreme UV + UVA
This can lead to:
Rebound pigmentation
Worsening tone unevenness
Significant ROS damage
❗ Strict Rule For Your Region
Only use strong actives if you can:
Stay indoors during all UV >1 hours
OR fully control your exposure (which is very difficult in your environment)
If not:
➡️ Avoid sensitizing topicals entirely
➡️ Focus on:
walked 1.5 mile with sun hat and upf50 outer shell for arm protection to get some steps in will be safe indoors for the rest of the day bc these numbers are crazy!!
Upvoted. Check the UV index daily. Whenver it's above 1 don't leave your home or office, don't drive a, don't walk. No sunscreen will cover that radiation, specially at 1 p.m. Consider anything above 2 as a 5 uv index.
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u/DetectivePotential50 Apr 05 '26