QUOTE(ozak @ Mar 6 2019, 01:54 PM)
Without the lumens number, it is hard to tell the brightness. Very subjective.
I said that lenglui is pretty. But you said like auntie. How ?
I said the color is red. But you see it is pink. How ?
You said bright, my imagination is like sun. Too bright. How ?
By lumens you mean the Philips 59203 lumens? I did mention it is at 900.
From my experience, those China lights typically at 18W is rated at 9xx lumens. For those such as Philips or LEDvance (Osram), they're good for 900~950 lumens at 10W. That's an improved efficiency or efficacy by quite a margin.
More than that, the light throw also matters. The diffuser of the China branded lights actually causes a high loss of light diffused through versus better diffuser designs of those branded lights.
Use a lux meter to measure the light at a few areas around your room after installation, the simplest lux meter you can find is your phone. Install a China branded light and measure it, then repeat the same with a better light. From there you can tell which light has a better light distribution and light throw. There are guides to comfortable lux levels for different settings, typically ranging from 100~200 for homes. Just looking at the lumens written on the box can sometimes be misleading.
Lumens = measure of light output
Lux = measure of lumens/area
There are some chinese branded lights that are really bright, but the trade-off is a low lifespan, or the brightness decreases lower than the 70% threshold when new very quickly. But from experience, just by installing and comparing one can tell the difference.
There are also chinese-branded lights that are equivalent or on par with the European brands such as Opple, FSL (but at a premium over regular chinese-branded lights). Even the European brands manufacture their lights in China.