How many lumens do you need from each bulb? How lumens does each HPS bulb currently put out. Not the watts, but lumens.
Knowing the current light output (lumens) and need, allows us to respond appropriately.
Lastly, is the light adequate from the HPS bulbs - or do you need more (or less).
Steve
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consulting on geothermal heating/cooling & rational energy use since 1990
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