Thermostat Heating idea for computer grow box - thoughts?

Hi all I have a computer box which I have setup, but my problem is that where I live intra coming into winter and its getting too cold once the lights are out so I have 2 ideas for creating temperature controlled in my box and was just wondering if anyone else has tried this or not

Well its really only the one idea but 2 different bulb options
Thermostat - http://www.ebay.com.au/itm/140931428355?redirect=mobile

Heat lamp option A - Heat lamp option B -

hey jdude89, i read on here somewhere that as long as the temps dont fall below 15c then you should be ok.
hope this helps
happy growing and good luck

thanks mate
im interested to try out the blue light during its night cycle
but wondering if anyone else have ever tried this?

Run your light cycle at night when its the coldest time of the day. That way your lighting provides the heat when its needed the most.

Get some seedling heat mats with temperature controller, and use them to maintane a minimum temp at the plant roots. More efficcient than a radiating point source. keep their feet warm