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Lumatek Twin 240V 600/400 Watt Dual HPS/MH Dial-A-Watt Dimmable Electronic Ballast http://www.lumatekballast.com/products/ballasts/#prod-172 has anybody used these at all ?

I have read here and determined that I have Nitrogen Abundance, I am using ebb and flo 55 gal barrel setup with buckets, technaflora family of nutes, chilled water to 66-67 air temp lights on - 71-75, water 15 mins every 2 hours. My question is how to I fix it? today is day one of flower and...