Since my 12 by 16 water storage solar greenhouse is being insulated so well and the sweat chamber is in the middle also insulated can a light bulb do the trick! Three 60 watt flourecent bulbs only use 11 watts of power each and give off lots of light and some heat! I would turn them on at dusk and keep them on till light! Would this work two fold for the seedlings giving them extra light in the winter and the heat they need to germinate?
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The sylvania instant on is suppose to last 8 years. and is really cheap to operate! The heat coming from the sweat chamber may be enough to keep the rest of the solar greenhouse above 32 all winter! What do you think! I will also have a white surface insulatio on the north wall of the sweathouse for more reflected light!