Performance of compact fluorescent lamps in exterior lighting fixtures at cold temperature

Luminaires were installed in a cold environmental chamber. Tests were carried out at 25°C, 10°C, 0°C, -10°C, and -30°C. Illuminance was measured at a fixed distance from the luminaires, and their electrical parameters were studied. Luminaires operated with compact fluorescent lamps (CFLs) in an environment of -30°C are shown to provide less than 30% of the illuminance obtained at 25°C. However, the electrical consumption and power factor are not very sensitive to the ambient temperature. Luminaires with CFLs are not recommended in a cold climate environment such as that of Quebec