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Originally Posted by jambutty
So it is permissible to compare different sources of light on a solar panel and is a good way of measuring the intensity of that light, because it is the intensity of the light that is crucial not its source.
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What do you mean by intensity? It's a bad way because you're measuring the ENERGY which dosn't equate to 'X source is better than Y' because it depends on which bits of the light spectrum its actually giving out. A lot of it could be wasted because we can't see it, but it'll still energy that the calculator can use.
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A low energy bulb rated at 11 watts allegedly gives off the same amount of light as a 60w normal bulb. I have proven that it doesn’t. A 15w LE bulb is the alleged equivalent of a 75w normal bulb.
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Again, LE light bulbs DO give off less light, this is the whole idea, its why they're more energy efficient. We're humans that use light to help us see things, we don't need the whole spectrum to do this, but if the whole spectrum is there then there is more energy so your calculator will work better, however this dosn't translate to your point because we don't need the extra energy as it makes no difference to our vision.
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Low energy bulbs are more energy efficient and do last about 6 times longer than a normal bulb but they cost a lot more. So just do the maths and you will discover that the new low energy bulbs are not as cost effective as the old type. So we are being conned.
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They might not be as cost effective (I can't be bothered to do the maths because its a none issue), but that isn't the point. We can't sit here relying on technology to save us from a decline of natural resources.
Normal light bulbs might be cheaper, but theres no point having extra cash in your pocket when theres no oil/coal/gas left!