Knowledge What is a lamp?


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Lamp” is a generic term for a man-made light source created for receiving electrical power and for generating optical radiation. Lamps are designed and constructed according to universal standards established for bases, sizes and shapes, allowing for the substitution of lamps by other manufacturers. Examples of lamps include bulbs and tubes. The term "lamp" is tied in with legacy lighting technologies such as incandescent, fluorescent, and high-intensity discharge (HID) lighting. LED lamps, to a large extent, are created as a retrofit solution for replace inefficient lamps in existing light fixtures. Even LED lamps are being phased out of the market. Modern lighting systems integrate LEDs, rather than LED bulbs or tubes, into light fixtures. The direct integration of LEDs significantly facilitates optical control, thermal management, electrical engineering, and luminaire design.

In a nutshell, a lamp is a light bulb or light tube. It's not a light fixture (luminaire). However, there is an exception. A portable luminaire consisting of a lamp with shade, reflector, housing, power supply, stand, switch, or other accessories is also called a "lamp", e.g. "table lamp", "desk lamp", and "floor lamp".

Common types of lamp bases

Edison screw lamp base
E5 - Midget
E10 Miniature (Flashlight lamp)
E11 Mini-Candelabra
E12 Candelabra
E14 European
E17 Intermediate
E26 Medium
E26D Three-way Medium
E27 Medium
E39 Mogul
E39D Three-way Mogul
E40 Mogul
Skirted (PAR-38)

Bayonet styles lamp base
Main article: Bayonet mount
BA9s Miniature bayonet
BA15s Single Contact Bayonet
BA15d Double Contact Bayonet
Bay15d Indexed DC Bayonet
Bay22 Double Contact Bayonet
Bayonet Candelabra with prefocusing collar
P28s Medium prefocus
P40s Mogul prefocus

Bi-pin lamp base
G4, GU4 & GZ4
G5.3, GU5.3, GX5.3, GY5.3, GZ5.3
G6.35, GY6.35 & GZ6.35
G8, GU8

Common types of light bulbs classified by shapes
Arbitrary (A15, A17, A19, A20, A21, A23)
Globe (G9, G11, G12, G16, G16.5, G19, G25, G30, G40)
Candle (C6, C7, C9, C11, C15)
Multifaceted Reflector (MR8, MR11, MR16, MR20)
Blown Reflector (R12, R14, R16, R20, R25, R30, R40)
Bulged Reflector (BR25, BR30, BR38, BR40)
Parabolic Aluminized Reflector (PAR14, PAR16, PAR20, PAR30, PAR38 Short or Long Neck)