Metal halide is used for vegging period.... your want HPS for flowering.... HOnestly i have been doing both with my hps with great results.. The cfls i only use them for the clones and stuff ( 4 weeks max ) .......Thats what you would use it for... clonses and a mother..... and that is nice.. if you dont want it ill pay for shipping and take it off your hands hehehehhe

good luck man
Actually.. i just saw a picture of it and dont want it thanks... hehehee.. those things are good for heat... I mean it was free so you should try it... It might work great for you..... But remember.... its for vegging.. if you try and flower with that thing you will be very disappointed witht he quality of the final product.
But dont worry... by the time you get some moms going.... 4 weeks or so.... you'll be able to save up for a light.... If your not growing allready .. you probably spend at least 50 a week... and if your like me more like 150.... LOL.... So take a week or 3 break and get your bad ass light for your ladies!