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2. FEL lamp - Wikipedia

   en.wikipedia.org/wiki/FEL_lamp

   The FEL lamp (less accurately called a light bulb) is an ANSI standard 1000 watt quartz halogen lamp with a G9.5 medium 2-pin base used in many stage and studio lights that costs around $12 and is available from a number of manufacturers including GE, Osram, Ushio, Eiko, and Philips. Note that the term FEL is an ANSI designation (not an acronym ...

3. Luminous efficacy - Wikipedia

   en.wikipedia.org/wiki/Luminous_efficacy

   Luminous efficacy. Luminous efficacy is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power, measured in lumens per watt in the International System of Units (SI). Depending on context, the power can be either the radiant flux of the source's output, or it can be the total power (electric power ...

4. LED lamp - Wikipedia

   en.wikipedia.org/wiki/LED_lamp

   As of 2010 some LED lamps replaced higher wattage bulbs; for example, one manufacturer claimed a 16-watt LED lamp was as bright as a 150 W halogen lamp. [70] A standard general-purpose incandescent bulb emits light at an efficacy of about 14 to 17 lm/W depending on its size and voltage. (Efficacy of incandescent lamps designed for 230 V ...

5. Metal-halide lamp - Wikipedia

   en.wikipedia.org/wiki/Metal-halide_lamp

   Metal-halide lamp. Metal halide lamp bulb (type /O with arc tube shield) A common spectrum of metal halide lamps in North America. Metal halide floodlights at a baseball field. Metal halide lamps were invented by Charles Proteus Steinmetz in 1912 and are now used in almost every city in the world. A metal-halide lamp is an electrical lamp that ...

6. Parabolic aluminized reflector - Wikipedia

   en.wikipedia.org/wiki/Parabolic_aluminized_reflector

   A parabolic aluminized reflector lamp (PAR lamp or simply PAR) is a type of electric lamp that is widely used in commercial, residential, and transportation illumination. It produces a highly directional beam. Usage includes theatrical lighting, locomotive headlamps, aircraft landing lights, and residential and commercial recessed lights ("cans ...

7. List of automotive light bulb types - Wikipedia

   en.wikipedia.org/wiki/List_of_automotive_light...

   UN Regulation 37 covers motor vehicle filament lamps. These are categorized in three groups: those without general restriction that can be used in any application, those acceptable only for signalling lights (not for road illumination lamps), and those no longer allowable as light sources for new type approvals but still permitted for production as replacement parts.