Low-pressure discharge lamp with cooled internal ballast

Low-pressure mercury vapor discharge lamp

Low-pressure mercury vapor discharge lamp

Low-pressure mercury vapor discharge lamp

Low-pressure mercury vapor discharge lamp and illuminator

Luminescent plasma discharge device, timepiece, having...

Magnetic arc spreading fluorescent lamps

Mercury target sensing and locating apparatus

Mercury-free high-intensity discharge lamp operating...

Metal halide lamp for operation with a mercury ballast

Metal vapor discharge lamp

Metal vapor discharge lamp

Metal vapor discharge lamp

Metallized glass seal resistor composition

Microdischarge devices and arrays

Modular system for movie set lighting

Multi-mode light-emitting device for underwater applications

Multiple air gap spark plug

Negative glow discharge lamp

Negative glow lamp