... ,100% tri-color powder fluorescent tube ,4.lamp base:PBT 5.lamp holder available:E14,E26,E27,B22 6.color temprature ... luminous efficiency : 1 piece of energy saving lamp equal to 5 pieces of incandescent bulbs ,for example ,2. Instant start, flicker free ... life : 1 piece of energy saving lamp equal to 8 pieces of incandescent bulbs ,for example , 4. two years warranty . Application ...