I felt the light in my 5x4 meter room was to dim so I installed 20x 1500lm lightbulbs, about 200W of LED. I've put them in two sections 6+14. I pretty much used

I felt the light in my 5x4 meter room was to dim so I installed 20x 1500lm lightbulbs, about 200W of LED. I've put them in two sections 6+14. I pretty much used all 20 all the time. Almost as bright as daylight in sunny day. Perceptually 6 were about half as bright as 20.