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wwkayaker · 05-12-2009, 08:36 AM

Jacob - Yeah, I understand that.

So to do the math, I take 200 Watts (two bulbs) minus 10 Watts and that leaves 190 Watts saved times 2 hours of use per day (estimated average. We use them to put the dogs out and see when they are ready to come in) times kWh/1,000 Wh. That gives me 0.38 kWh per day times 365, times $0.65 (on my bill).

I save $90 per year for both lights ($45 per light). That is equivalent to 0.1 tons CO2 per year for both lights.

05-12-2009, 08:36 AM	#3 (permalink)
wwkayaker EcoModding Lurker Join Date: Jul 2008 Location: Carmel, IN Posts: 61 Kayak hauler - '05 Mitsubishi Lancer ES 90 day: 33.88 mpg (US) Thanks: 3 Thanked 3 Times in 3 Posts	Jacob - Yeah, I understand that. So to do the math, I take 200 Watts (two bulbs) minus 10 Watts and that leaves 190 Watts saved times 2 hours of use per day (estimated average. We use them to put the dogs out and see when they are ready to come in) times kWh/1,000 Wh. That gives me 0.38 kWh per day times 365, times $0.65 (on my bill). I save $90 per year for both lights ($45 per light). That is equivalent to 0.1 tons CO2 per year for both lights.