美国ge荧光灯f42t12-cw-ho冷白光灯管
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