Replaces T8 /T10/ T12 fluorescent tubes with mechanical ballast (with/out correction capacitor). 1. 40% to 45% power savings + More Environmentally friendly Components = green lighting 2. Advanced technology, and perfect performance, warm start, PF>0.99, THD10%, wide voltage(150-270V), no flicker or hum. 3. Easy DIY install, no need to rewire (only several minutes, no touch existing Fluorescent fittings, just replace T12 or T8 tube by T5 adapter and tube, then starter replacement, that's ok). 4. reliable quality and Long Life, ballast three years and tube 10000 hours Complies with CE&TUV use for offices, supermarkets, schools, hospitals etc.