Is lens separation common? Outside of the bulb filament, how long should a PAR38 last if it's only used occasionally?
This morning I found the shattered glass lens of a PAR38 on the rocks under the fixture, which is mounted under the soffit about 12' above. The bulb filament & reflector are intact. However the gray adhesive that affixed the lens to the reflector was flaking off.
These bulbs are used an average of roughly 2 hours a week, often for five or ten minutes at a time ... so maybe 100 hours a year. I've never seen one fail like this before.
It's a 100W Sylvania halogen and I have no idea how old it is. The bulb was on last night from about 7:30 to 9:30. This morning it was an unseasonable 49 F at 6 AM, so it actually warmed up overnight.--
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