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Photoflood lamps are a type of incandescent light bulb designed for use as a continuous light source for photographic lighting. [1] The filaments of such lamps are operated at much higher temperatures than is the case for standard, general lighting service lamps.
PAR64 sealed beam lamps are often used for these purposes; they are typically available with 250, 500 or 1000 watt power ratings. Beam spreads are designated as FL ( flood ), SP ( spot ), NSP (narrow spot), and VNSP (very narrow spot), as stamped on the back of the lamp's reflector.
The most common type of floodlight was the metal-halide lamp, which emits a bright white light (typically 75–100 lumens/Watt). Sodium-vapor lamps are also commonly used for sporting events, as they have a very high lumen to watt ratio (typically 80–140 lumens/Watt), making them a cost-effective choice when certain lux levels must be provided. [4]
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 ...
Some manufacturers are designing LED and photovoltaic luminaires to provide an energy-efficient alternative to traditional street light fixtures. [16] [17] [18] Floodlights are used to illuminate outdoor playing fields or work zones during nighttime. Floodlights can be used to illuminate work zones [19] or outdoor playing fields during ...
As of 2011, some LED bulbs provide up to 150 lm/W and even inexpensive low-end models typically exceed 50 lm/W, so that a 6-watt LED could achieve the same results as a standard 40-watt incandescent bulb. The lower heat output of LEDs also reduces demand on air conditioning systems.
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