Click to expand Tap to zoom T-12 Lamps High Output Save Liquid error (product-badge line 32): Computation results to '-Infinity'% $129.95 | / Taxes 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart World’s brightest T-12 fluorescent tubes grow plants faster 6 lamps per packRegular fluorescent tubes give off barely enough energy for plant growth. These fluorescent tubes for standard fixtures are much brighter (3240 lumens) and produce the most effective growing results. “Full-spectrum” output is very close to real daylight that brings out the true vibrant colors of your plants and flowers. Extra-long life, 48,000 hrs. Fits a standard 40 watts, 4-ft fixture, but do not use in “Shop Lights.” (All lamps burn out prematurely in “Shop Lights.”)Specs: 40 watts, K = 6700, CRI 93.Bulbs are T-12 but fit T-10 and T-12 fixtures.