Im having issues with my 2527 lights in the display and was going to just replace them and if memory serves me correct Are these 6 or 7 volt 5mm bulbs? I have everything a guy could want but the closest I have are blue 5 volt LED 5mm bulbs where do I get replacement bulbs and what is the actual voltage rating on the bulbs? I know there are orange caps that can be swapped over to the new bulbs.