Aquatic Life Hydroponic Bulbs, 54-Watt T5HO (46.5" Long) 6,500K Cool White Grow (4-Pack) Made in Germany Hydroponic T5 HO 48-Inch Lamps, 54 Watt 6,500K Cool White for Growing These lamps are ideal for starting seeds and cuttings. Engineered to reproduce all the colors and balance of natural daylight. 48" T5 HO Lamps are 46.5" long - T5 HO light output at a great price! Shipped in special packaging to prevent breakage - Available in 4 packs only.