I used 2 use a hps for vegging and flowering for ages, a few grows any way .It Did the job perfect but was costing me more than i needed to you could just buy a mh buld and switch it with the hps its still going to cost the same thou .

I got two of these 100w energy saving cfls from ebay cost me under 10 pounds each they are perfect and saves me loads and they are great for vegging i luv em:jointsmile: