#GTEA09 Greenbox: key number, 1 watt for 1 year (1 watt-year) = $2. An oven clock drawing 25 watts continuously = $50 base cost per year.

#GTEA09 Greenbox: key number, 1 watt for 1 year (1 watt-year) = $2. An oven clock drawing 25 watts continuously = $50 base cost per year.