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switchabile ballast issues

sir-tokes-alot

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May 15, 2012
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fixing to start mt 4th grow with 400 wt sunsystem/hydrofarms ballast/air cooled hood and decided to switch it to MH bulb for first time and dont think its acting right!! it comes on and lights up then every couple minutes ballast starts buzzing and light gets alot brighter for a minute or so then stops for a minute or so and light dims back, and ballast gets alot hotter than it ever did with the HPS bulb, any body got any wisdom on this thang????
 

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