Hi..Ive been having some problems with the lights in my wh20 topper. Right now i have leds and about 5 of them have quit working. I had the clear cover off and noticed the leds were really hot, i mean HOT!!. Im thinking about going back to the #194 incandesent bulbs. does anybody make a blue #194 light bulb? Can i use #906 bulbs? What have you used in your topper wh20 owners.?thanks.