The local discounter had Rosy tint Spray and Cheap LED bulbs.
So a stupid Friday night idea was born .
The result on the Ikea bulb:
It started at a Duv of +48 mDuv
I applied a relay thin coating did a test and went for a thicker coating.
I overshot and landed at -7mDuv
R9 also improved from 39 to 50!
My non calibrated measurement went from 394.4lm to 319.9lm so i lost 74.5lm so about 19% lumen loss
full report:
ikea_minus_duv_2_mean_of_10_shots__report.pdf (528.2 KB)
The Aldi e27 bulb started with a way better light. Only slightly positive +24mDuv and CIR 91 with a Decent R9 of 45
But i went all in and gave it a thick coating of the Rosy spar resulting in a -80mDuv and CRI of only 83 (but R9 still went up to 64)
The lumen output went from 176.9lm to 106.0lm.
i Also did one with the blue paint
and for compression all together with 2 different 40W incandescent Bulbs (“glühbirne”)
