By Aquilegia
Cambridgeshire,
United Kingdom 
This is not a question, just passing on some information, have tried to back track to find the original question to add to it but had no luck. It about heating a greenhouse with candles that came up a while ago, Asda are selling large tea lights at 10 for two pounds and they burn for 10 to 12 hours, just thought I would add this tip bit in case anyone was interested in in trying
On plant
tea lights
20 Feb, 2014
Hello Aquilegia ..
There are these 2 questions re. greenhouse heating ..
http://www.growsonyou.com/question/show/175236
http://www.growsonyou.com/question/show/175446
Also mentioned in these 2 recent blogs.
http://www.growsonyou.com/dungy/blog/25629-today-s-doings-and-tomorrow-s-thoughts
and a second blog has been written ...
http://www.growsonyou.com/dungy/blog/25635-heating-the-greenhouse
I hope this helps ...
20 Feb, 2014