Purchased to replace halogen bulbs mounted on 5 spots stretched cables, pvc with a false ceiling above, it's perfect! I therefore now 5x4w 20w instead of 100w 5x20w therefore at the base !! On top of that I Forgot 190lumens these 325 lumens, this is the day and night is the case to say! we see much better! And no problem with heating the leds near my PVC ceiling, even less Moreover thanks to ceramics! I will recommend to get ahead;)