hey stinky.. well i just thought about what you said.. is there a chance that even if i switch lights off at say 12lunch time till6pm that it could still be too cold in there for them? as the days are very cold at the moment and getting colder.. hense would i just be better off putting a little heater in there with a timer so it kicks in lights out n turns off lights on? i received a magazine from my local hyro store today.. they have heaters in there for grow rooms at £16.99... 2kw fan heater three settings 1000w 2000w and cool blow does that sound ok? thanks again stinky