A lot of the noteworthy makers of today utilize the unbreakable quartz bulbs and so the hot spot concern is not a larger problem currently. Still, it is good to wear the latex handwear covers when managing the front lights to make sure that you will certainly get the most effective life span of it. Simply do a search on Bi Xenon CONCEALED H4 Slim Set. I personally use 10K light bulbs cause I like the intense blue.