Sunlite 4w T5 F4T5/BLB Blacklight Blue Fluorescent Tube Light Fluorescent bulbs are energy saving bulbs and last up to 10 times longer than incandescent bulbs Fluorescent bulbs help you save money using 40 - 70% less energy than incandescent bulbs Fluorescent bulbs are 5-8 times more brighter (more output lumens /watt) than incandescent bulbs Sunlite T5 fluorescent bulb, 4W, Base: G5 2-Pin, Color Temp: , Rated Life (hours): 6000