This simplest linear light bulb replacement can replace T8 linear lamps and can be used with most electron or magnetic ballasts. The test tube provides bright, energy, saving light in the kitchen, laundry room, garage, etc. and saves up to 40 % of energy (compared with the F32T8 electron instant starting system). These light bulbs are immediately turned on without mercury, running at the cold temperature and a long-life. The LED life means the length of time (in the hour) (until half of the LED light source maintains 70 % of its initial flow output. Compatible with the flow, open immediately, make bright and clear light, bright, what is suitable for often open/level rooms, 50,000-hours of life.