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If a 5w bulb and a 60w bulb output the same amount of light, those 55w are being wasted elsewhere (heat). I said 50 because I was afraid someone would go 'ACTU

If a 5w bulb and a 60w bulb output the same amount of light, those 55w are being wasted elsewhere (heat). I said 50 because I was afraid someone would go 'ACTUALLY LED's only save 50-55w', I didn't expect someone to argue that the 5w led bulb is also outputting heat. You are of course right, 2.5w of that 5w is likely heat being cooled by the AC. >I would not be surprised if there were a 10x increase in use of lighting with LEDs. Quite frankly I don't care either way, I just wanted a source. I'm happy you feel that way though.

aurareturn 2y ago
Quite frankly I don't care either way, I just wanted a source. I'm happy you feel that way though. This is the best write up I found for lighting source, efficiency, and consumption relationship. As a first step in looking at this, I’ve taken the data from the analysis and plotted it on a log scale. This shows clearly how consumption has increased as population and incomes (measured by per capita GDP) have risen and prices have fallen. The central role played by efficiency is indicated by the dashed line, which shows the number of kWh needed to produce a unit of light (1/efficiency). Comparing this with the solid blue price line showing price indicates that the 100 fold fall in price per unit of light in the 20th century was due to increased efficiency, mainly as electricity replaced gas. Yet demand rose strongly over the period, increasing more than 100 fold. This challenges the view that increases in efficiency translate into reductions in demand, and thus emissions. https://onclimatechangepolicydotorg.wordpress.com/low-carbon-technologies-section-overview/long-term-trends-in-lighting-efficiency-and-consumption/ https://onclimatechangepolicydotorg.wordpress.com/low-carbon...