mack1

Hi Mack,

Here are a few tidbits that I know about green houses that you may, or may not know. Light in the visual spectrum can pass through glass better than plastic. Car manufacturers did us a dis-service when they switched from sealed beam headlights to plastic. Once inside the green house, light needs to be absorbed by something black and not shiny. If the light is caused to reflect back, it will leave the green house. Dark objects absorb the light rays and re-radiate light energy back, but in the infrared spectrum which won't go through glass. That is the essence of the green house effect. If you use well insolated walls and double pane glass in the roof, it will stay much warmer inside. The plants, of course, need the sunlight, but under the plants, dull black plastic would help trap the extra rays.

Oddly, I learned most of this at an infrared techschool.

Best regards,
Mack1