Hello!
I need to install some new leds for my bedroom. Room size is 4m x 5m, so please ask how the number of downlights to use is calculated how?
Thank you!
Generally people don't have their bedrooms very bright, 300 lux at the high end, 100 at the low end. As you can always dim lights, I would start at the high end. 300 lux * 4 * 5 = 6,000 lux. If you have 600 lumens/fixture, then you need 10. If you have 800 lumens/fixture, then 8. You may be drawn to high output fixtures, but with down lights you need more for good lighting.
Personally I don't recommend the new flat/flush mount ones ...where you just see a small flat panel light source. They are trendy, but really not the best lighting as they have higher glare. I prefer something inset which will hide the direct light source from most viewing angles.