PREMIUM T5/28W Tube Light The "Most Economical " Substitute against "Standard Tube Lights". " Electricity Consumption : Around 65% as compared to Std Tubelights Special Features Operating Voltage : 140 - 270 VAC Power Factor : Above 94% Starting : Instant ( at low voltage ) without flickering Lamp Life : 20,000 Hrs ( 4 times as compared to Std Tubelights ) Lumen Depreciation : 7% per year ( whereas Std Tubelights is 40% ) Mercury : Lower than 5 mg. Maintenance : NIL Inverter Friendliness : Good Available : Warm Light 4,000K / Cool White 6,500K