A:Answer These are outdoor bulbs, but I actually use them indoors in a lamp, since they are brighter than the standard A19 Hue bulbs. The 'PAR' part just refers to the size of the bulb itself. The bulb base (the part that screws into the light socket) is the same as a standard light bulb. Since these bulbs are LED, they do not produce the heat that you find with a regular incandescent bulb, so use in recessed lighting would be absolutely fine.