First, they don't dim gradually, but in 3 stages: full light, half light and off. Customer service advised me to put 1 regular halogen bulb in front of their LEDs and it will work. It really WORKS but now we have 1 super hot lightbulb my wife's hand can touch under her cupboard where she is cooking. So I replaced hot halogen bulbs with LEDs. SECONDLY, between 6 and 7 months of use, the light bulbs deteriorate - they blink and go out. NOW I can't find any way (on Revain or the web) to contact them about their 1 year warranty.