iPower 4FT 48IN 54W T5 Fluorescent High Output HO Cool Blue Grow Light Bulbs 5 PACK 6400K PACKAGE INCLUDES: 5 Packs T5 HO Fluorescent Grow Light Bulbs of 54W Each SPECIFICATION: Color Temperature: 6400K. Warm spectrum for flower productionLumen: 5000LMLength: 4FT/48IN NEW TECHNOLOGY FOR DIFFERENT USEAGE: iPower T5 Fluorescent Grow Light Bulbs feature a Full spectrum and high output intensity with just 24watt power usage which provide everything you need to get your plants growing. Ideal for Aquariums, greenhouses, propagation, germination, general office lighting EXCEPTED USING TIME: The average useable lifespan is well over 20,000 hours FREQUENTLY USE WITH: ipower fixture, ipower timer, ipower glrope