Editing Halogen lamp (section)

===General lighting ===

[[File:PH 2.jpg|thumb|A 150W Halogen floodlight]]

Fixed-mount lamps are used in indoor and outdoor flood lighting, although improvements in LED systems are displacing halogen lamps. Round spotlights with built-in [[multifaceted reflector]] lamps are widely used in residential and commercial lighting. Tubular halogen lamps provide a large quantity of light from a small source and so can be used to produce powerful flood lamps for architectural lighting effects, or for lighting large areas outdoors.

Low voltage lamps use the GU5.3 and similar [[Bi-pin lamp base|bi-pin bases]], whereas mains voltage lamps use the same caps as normal mains tungsten filament lamps, or a special GU10/GZ10 base. The GU10/GZ10 bases are shaped to prevent [[dichroic]] reflector lamps being used in [[light fixture|luminaires]] intended for aluminised reflector lamps, which could cause overheating of the fitting. Higher efficiency LED versions of all of these lamps are now available.

Tubular lamps with electrical contacts at each end are now being used in standalone lamps and household fixtures. These come in various lengths and power ratings (50–300&nbsp;W). More powerful lamps are used as portable work lights, with bulbs rated 250 or 500 watts.