The main difference between T8 and T12 tubes is the tube's diameter. T12 tubes are 1.5" in diameter while T8s...

SMD means surface mounted diode. This is a better technology than the first generation DIP LEDs. The SMD type LEDs...

It is not used. Current is constant in all parts and components along a path without branches. Any charge that...

Unauthorized use is prohibited. Left: One of the earliest known African-American inventors, Lewis Latimer played a key role in the...