Verilux L17T8VLX Full Spectrum 17 Watt 48" Energy Efficient LED Tubes - 4 pack | Grow Light, Seed Starting, Office, Workshop Lighting Sold in cases of four energy efficient, 17 Watt, 48" LED Tubes compatible with T8 ballasts. Full spectrum LED tubes, 6500K, 1800 Lumens, 90 CRI. Cool white, full spectrum output is suitable for use as office or workshop lighting. Full spectrum output makes for excellent grow light applications (seed starting and plants such as African violets and orchids).