R
rebornfarmer
- 21
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Has anyone ever heard of switching to MH from HPS the last 10 days of flowering? Anyone try experimenting with this? just curious. I think i would rather switch to a dual arc the last 2 weeks then full MH (shock and all) i dont know but heres the article.
Ask Ed: Grow Questions and Answers
By Ed Rosenthal - Saturday, September 6 2008
Tags: Ask Ed,CC69.
Metal halide lamps emit more UV-B light than high-pressure sodium (HPS) lamps, so for more potent buds it is a good idea to use MH lamps the last 10 days of flowering. Air-cooled light reflectors have glass covers that absorb UV-B light. If it is feasible, remove it, so the light can shine unobstructed on the plants. To prevent the garden from overheating, keep the inline fans on, which will draw air in from the garden space to cool the lights
Ask Ed: Grow Questions and Answers
By Ed Rosenthal - Saturday, September 6 2008
Tags: Ask Ed,CC69.
Metal halide lamps emit more UV-B light than high-pressure sodium (HPS) lamps, so for more potent buds it is a good idea to use MH lamps the last 10 days of flowering. Air-cooled light reflectors have glass covers that absorb UV-B light. If it is feasible, remove it, so the light can shine unobstructed on the plants. To prevent the garden from overheating, keep the inline fans on, which will draw air in from the garden space to cool the lights