Why LEDs Are Better Than Fluorescents

The chart below compares photon flux delivered by an array of 72 watts of LEDGrowLights and from 320 watts of fluorescent grow lights.

LEDGrowLights provide much more of the useful red and blue areas of the spectrum than the fluorescents.

Comparison of photon flux delivered by 72 watts of LEDGrowLights^TM(six, 10-watt R180XB and six, 2 watt B60RA manufactured by LGL Technologies and 320 watts of fluorescent lights (eight, 40 watt "Plant & Aquarium" fluorescent bulbs manufactured by General Electric.)
Original photon flux measurements courtesy of Issac Wong. Photon flux measurements taken with a portable Li-Cor spectradiometer courtesy of Texas A&M University.