(Note: The best way to reduce the carbon footprint of seed starting is to start seeds outdoors and use natural sunlight and rainfall. When seed must be started indoors, use the most efficient lighting to get the job done.)
For the plant sync, we use a large number of shoplight-style light fixtures to grow plants year round. These lights use power and cause greenhouse gas emissions. Energy efficient LED shoplights are now available and affordable at retail. We have used these for our growing operation and they work just fine. A watt meter confirms the energy savings between my old fluorescent fixtures and our new LED fixtures. A replacement of one fixture will save more than 100 kwh/year.
This ticker below shows an estimate of the cumulative and ongoing reduction in carbon dioxide equivalents from the LED replacements we have made so far.* We have more fixtures to replace. By supporting my GoFundMe campaign you can instantly reduce global greenhouse emissions by paying for a replacement fixture.
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*Calculations are based on 100kwh/year/fixture saved and 70.3 kg/year/fixture CO2-equivalent emissions . This is an estimate. Actual values will vary depending on the specific fixtures, the source of power, and other assumptions. (see EPA for calculator)