T5 Replacement Lamps (Fluorescent Grow-Light Spectrum Tube) - 8 Watt Grow Light Non-Linkable Set of Four 8W T5 Fluorsecent Growlight Replacement Lamps ("Lightbulbs/ Tubes" Only) For our 8W Grow Light Fixtures or 32W (4 x 8W) GrowlightPro Lighted Plant Stands. F8T5 GR, 12" long. Replacement lamps provide balances light for indoor growth