I am going to attempt to insulate around halogen (high hat) ceiling light fixtures from above in the attic crawl space. Can someone recommend the best type to use that is fire safe? And can it be purchased at a home center (consumer available)?
The insulation should be installed per the light fixtures UL listing. Some fixtures are rated for direct contact with insulation.$$$ Some require a small clearance. $$ The least expensive fixtures are not rated at all for contact with insulation.
Best check your local codes for what your attempting.
You MUST NOT insulate around recessed lighting fixtures _unless_ the fixture is explicitly rated for it.
Fiberglass will smolder somewhat and outgas (flammable binders). Rock wool won't (and melts at considerably higher temperatures), but the fixture will melt down anyway.
More than living on the edge. Active death wish. Fixtures not rated for burial in insulation _will_ burn out. If you're lucky. Otherwise, they'll catch fire and burn your house down.
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