28/08/2026
We had the timing backwards.
Most of us spend the whole day indoors avoiding the sun, then reach for blue-light glasses at night to "protect our sleep." But your body clock isn't set by what happens in the evening it's set the moment you wake up.
Here's the number that changes everything: your living room, with every light switched on, is around 300 lux. Step outside on a grey morning and it jumps to roughly 10,000. Your eyes adjust so fast you'd never notice. Your biology does though indoors registers as dim, all day, every day. And morning light is the strongest signal your circadian rhythm gets. It's what tells your body when to release melatonin that night.
In Bangkok, timing matters more than most places. UV climbs fast about 1 at 7am, 3 by 8am, 6 by 9am, up to 14 by midday. Samitivej's guidance is to stay out of direct sun entirely between 10am and 3pm. So the real window is roughly 6:30–8am. That's it that's the whole instruction.
The signal goes in through your eyes, not your skin, so you're not trying to tan. Sunscreen and a hat change nothing about the effect. Just be outside with your eyes open (never looking directly at the sun). Fifteen to thirty minutes is enough coffee on the balcony, walking to get breakfast instead of ordering in, sitting outside instead of in.
There's nothing to buy here. It's free, and it might be the highest-return five minutes of your whole day.
What time do you actually get outside? Be honest, we want to know how many of us make it out before 9am. 🌤️
📍 HappyLyfe - Sukhumvit Soi 26, Phrom Phong, Bangkok
🕚 Open Tuesday–Sunday, 11:00–21:00
🐾 Mochi the shop dog is in on Sundays if you need another reason to stop by after your morning light walk.
