In FIRE LOSS FROM IMPROPER HALOGEN FLOODLIGHT INSTALLATION, failure analysis expert witness Charles C. Roberts writes:
Halogen floodlights have been used in both residential and industrial applications for years. They are characterized by high light intensity on task and high heat dissipation….
Most manufacturers of halogen flood lamps warn about the fire hazards of insufficient clearance between the fixture and combustible materials. Ignoring these recommendations can precipitate a significant fire loss as illustrated by this field expedient.
Read more: http://www.croberts.com/flood.htm.