That light is suitable for the space, but it may not quite be powerful enough for four mature female plants. Don't get me wrong, it'll definitely work... but it may not produce the densest buds because the light will have a hard time penetrating beneath the canopy. If you can ventilate the room in question, you may want to think about getting a 400w instead. But, regardless of which system you get, make sure you're able to keep the area cool. You want to keep 'daytime' temperatures below 80F if at all possible. Cool-tubes and air cooled hoods make this much easier.

If you're bound and determined to go with a 250w system, maybe think about paying a little bit extra for a switchable ballast that'll run both MH and HPS. If you only have a choice between one or the other, I'd recommend going with an HPS. Much better spectrum for flowering, and is also fully capable of vegging plants... you'll just need to watch out, because HPS light can cause plants to stretch, especially when they're seedlings.

(Edit: Oops, sorry Stinky... ya beat me to it. You can delete this post if you'd like.)
Mr. Clandestine Reviewed by Mr. Clandestine on . will this work? our growing area is around 4' tall , 2' deep and 2' wide would this light be suitable for the space? with 3-4 plants 250W METAL HALIDE HID HIGH INTENSITY DISCHARGE LIGHT on eBay, also, Lights Lighting, Building Materials Supplies, Business, Office Industrial (end time 30-Mar-08 10:22:44 BST) they are just 7 days into the flowering, and have been under a 75w fluorescent. new, so help would be appreciated . we are just doing this for a bit of fun, on the cheaper side of things Rating: 5