I picked up one of these initially,... it works,... but the bulbs that come with it are kinda Chitty. And the heat generation was immense! I had a 6" computer fan blowing over the bulb, and my 8" exhaust tube taped to the back side of the reflector behind the bulb to pull most of the heat out of the room.

Amazon.com: 400 Watt Electronic Switchable Ballast Hydroponic Grow Lamp System with Metal Halide and High Pressure Sodium HPS Light Bulbs, Cord + Hanger, GYO2002: Patio, Lawn & Garden

Now I'm using this light for veging, EGL 120 TRI-BAND LED grow light | High quality hydroponic LED grow light product | Ecogroled

Given your area,... you could use the LED all the way thru for a single plant,.... or save a littel and get the 90w