I haven't the slightest clue about these what so ever. I am growing in a 2x4x6 foot closet. Vents are an issue because i am renting the property. I will be able to provide some ventilation but nothing crazy. I am wondering if I could get away with a 250 watt or 150 watt hps lamp and am looking at suggestions for which ones to buy. I really do not want to spend more than about 75 dollars.