thefreeman
(thefreeman)
104
A bit of necroposting.
These didn’t last very long, at first we didn’t notice because the dimming was progressive, but at some point we realised it was much less illuminating than before, I checked by replacing them and the difference was huge (don’t remember exactly how much).
They were driven at 170mA which was their normal rating, the heatsink was around 50°C max.
Now I have replaced them with this which I was already using in my office for some time : https://eu.mouser.com/ProductDetail/Lumileds/L2C5-30901211F19P0?qs=bZr6mbWTK5ldXl%252BO0rrT1w%3D%3D&countryCode=DE¤cyCode=EUR
”only” 90CRI but significantly brighter at the same power, and this is a negative duv (~-0.0040) COB so the light is very pleasant.
1 Thank