D domnic Senior Member Occupation Electrical Contractor Jan 14, 2015 #1 How many amps does a 4 lamp t12 4' draw vs a 4 lamp t8 4' ?
S suemarkp Senior Member Location Kent, WA Occupation Retired Engineer Jan 14, 2015 #2 Depends on the ballast and which lamps you use. A "normal" T8 lamp is 32 watts and a "normal" T12 lamp is 40 watts. I have a dual T8 fixture whose ballast says 0.5A which makes sense for 64 watts at 120V and a power factor of 1.
Depends on the ballast and which lamps you use. A "normal" T8 lamp is 32 watts and a "normal" T12 lamp is 40 watts. I have a dual T8 fixture whose ballast says 0.5A which makes sense for 64 watts at 120V and a power factor of 1.
