Custom CRI 90+ 4W GU10 LED spotlight bulb LUXEON 2700/4000/5000K

[Bocian]

Some time ago Maukka tested Citizen 97 CRI 6,5W GU10 light sources. Link below:

Bocians custom 97 typ. CRI 6,5W GU10 LED spotlight bulb 2700/3000/4000K

I wanted to present a few replacements for incandescent GU10 / MR16 LED sources based on Citizen COB type LED emitter (6th generation). CRI typical 97. The radiator is an aluminum cast (anodized) which means that the LED is in direct contact with the mass of the radiator - this has a positive effect on its thermal operating conditions. The total active power consumed from the 230V grid is 6.5W. 160mA current powers the LED with the voltage of 37.2 V, which gives ~ 5.9W of power with which the C…

Measurements:

Bocian Citizen COB 6 W LED spotlight bulb review (CRI97, GU10)

Bocian sent me three of his Citizen COB based spotlights for testing. They come in three variations, 2700, 3000 and 4000 Kelvin, which covers the whole range of Citizen COB model number CLU028-1201C4 (click for datasheet). [image] They are relatively low power at 6.5 watts but with a good power factor of >0.9. All the models have great color rendering. The 3000 K sample of mine was a bit yellow, but the 2700 K and 4000 K were great. The beam is wide and even, so not really a spotlight. Here’s…