美國GE熒光燈F42T12-CW-HO冷白光燈管
GENERAL CHARACTERISTICS
Lamp type:Linear Fluorescent - Straight Linear
Bulb:T12
Base:Recessed Double Contact (R17d)
Primary Application:Full Wattage
Rated Life (NOM);9000 hrs
Bulb Material:Soda lime
Starting Temperature (MIN):-29 °C(-20 °F)
Mercury Content (NOM):60 mg
Picograms of Mercury (NOM):2390 picograms Hg per mean lumen hour

PHOTOMETRIC CHARACTERISTICS
Initial Lumens (NOM):3200
Mean Lumens (NOM):2790
Nominal Initial Lumens per Watt (NOM):58
Color Temperature (NOM):4100 K
Color Rendering Index (CRI) (NOM):60

ELECTRICAL CHARACTERISTICS
Wattage (NOM):55.0
Cathode Resistance Ratio - Rh/Rc (MIN):4.25
Cathode Resistance Ratio - Rh/Rc (MAX):6.5
Current Crest Factor (MAX):1.7