Quote Originally Posted by kuba1a2b
heyy i was wondering if anyone has ever used LPS for growing,,,,if so what were your results,,,here are some specks
# Watts: 90
# Lumens (Initial): 12750
# Lumens (Mean): 11095
# Average Life in Hours: 16000
# Color Temperature (K): 1800
# Color Rendering Index (Ra) CRI (> or =): 0
Low pressure sod or mercury vapor lights have a very high luminous efficiency, even higher than HPS/MH. However, the light is monochromatic and is centered at 590nm which is absolutley perfect for the human eyeball (lumens) however, with very little blue and red light within the spectrum of LPS, the usefulness for growing is virtually 0, actually an equal wattage of incandecent light would do most likely better in flowering than a lps.