you can buy hps and mh ballist kits online there pretty cheap in your compatent enough to put one together they'll save you a bit of money
and if you search around here there are wireing diagrams that will help

good luck-Bomb
smokinbomb Reviewed by smokinbomb on . Anybody ever built a HPS light? Has anyone ever constructed their own HPS light? Case, etc. Doesnt seem to hard to do if you know whats inside. Is their a special ballast? Tryna Rating: 5