Low Pressure Sodium???

[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

[TheXFactor]

first question.how much will this light cost you?

if its not free its not worth it. I was reading yesterday in Gardening Indoors with Soils & Hydroponics by George van pattern. and in his 20-40 years experience with himself and every other garden he ever saw, and of the hundreds or thousands of lamps hes seen in use, he only remember seeing 1 LPS.

you will get better results from a flouro t-5 of some 100-200watt cfl with proper kelvin temps, they sell these at HD for a couple of dollars, the ballast/refelctor with clamp and 8ft cord for 5-6 $ and a bulb for 4-5$ add a bunch to the lid of a big bin, bucket top, sheet wood, you can place 4-8-10-20-40 but beyond 10 you might as well get a 400-600w mh lamp+hood+ballast. for 200-400$ but then you might need to get some duct work and an inline fan.50-500$ and at that point u might invest in a carbon filter setup 50-300$

theres a lot of options out there, just get the right soil. or make the right mixture... im having big problems with my grow and im not sure what it is yet but im constantly starting new seed as the the other 2-3 week seedling practically dying. changing each couple of seeds with differnt variables, 2 types of water, 2 types of soil, 2 sets of lights. if its the soil, then i should be cranking out some good nug in some time.

[billyjojimbob11]

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.