This replacement Sunleaves Satellite VitaLUME Bloom Tube fits Sunleaves Satellite II and IV fluorescent fixtures. Each 105-watt Bloom Tube emits 11,000 lumens with a color temperature of 3000 Kelvins to stimulate fruiting and flowering in plants. Both bloom and grow VitaLUME TT105 tube types may be used simultaneously in either Satellite system.