Can the blb18w be used in a sealed par 38 landscape light for outdoor use? Concerned about possibility of heat build up in a sealed fixture.
Sorry but it is not designed with enough heat sink for an enclosed fixture.
Can the bulb be used with a dimmer? If not, can it be used with the dimmer on full brightness?
This lamp is not deaigned to dim on a dimmer pack. Now as you said if you go to full 100% brightness you shoulen't cause the lamp to overheat, but dimming will cause it to overheat and fail. It is only designed for Off and On operation.
Does the BLB18W actually emit UVA light? Or is there a filter on it? Thanks,
It omits UV light.