Sorry for the confusion. It is a single 400 Watt light and the brand name or sytem name is sun system 2.

http://www.thehydrosource.com/Lighting/Reflectors/Sun_System_2_400w_Switchable_MHHPS with an MH for veg and HPS for flowering.

Also thanks for the fan advice. Any money that I am able to save is great so I really appreciate it!
chron legacy Reviewed by chron legacy on . Ventilation question Hello folks, I am starting a 48X24X60 grow tent and I just had a few questions about ventilation. 1. My plan is to use a ValuLine 6 in Centrifugal Fan - 435 Cfm for fresh air intake at the bottom of my tent and then an Active Air Blower System - 60 CFM at the top of my tent for exaust. Would this work? It sounds like it could be too much intake and not enough exhaust? 2. My second question is about fan timers. Is it ok to just run these fans non-stop or do I need to invest in timers? If so Rating: 5