Sold in a pack of 4 tubes.
The Active Grow 24W T5 High-Output 4FT lamp is a plug and play LED tube that replaces 54W T5 HO 4FT fluorescent lamps and features lower power consumption, double the PPF efficiency and 100% more effective spectrums for plant growth. The T5 HO LED lamp is a direct conversion lamp that is easy to install and suitable for use with a wide range of Instant Start and Programmed Start ballasts. All Active Grow T5 HO lamps now feature ClearSync film technology that improves water-resistance and prevents glass shattering without sacrificing photon output. *Disclaimer: Not Compatible with Single Unit T5 HO Fixtures.