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Originally Posted by ad47uk What do you mean it don't mean anything? my mate tested a 30 watt low energy bulb using a energy tester, It is 30 watts because it is a day light bulb and to be honest it give out [pretty good light, but when he switched it on the bulb took over 60 watts, which is twice as much. the bulb will be fine for a room where it is left on, but useless for rooms, where you only enter for a few mins. |
But for how long did it consume 60W? That's why I said your claim was meaningless. Energy is an absolute measure, in joules. Power (in watts) is a measure of the
rate of energy consumption. How much energy the bulb uses in normal operation will depend on how long it is left on for...
If the 60 watts reading persisted, I suspect your friend may have inadvertently been measuring VA (apparent power) not watts (true power). Some energy saving bulbs have rather low power factors, whereas incandescent lamps have a power factor of 1.
I have measured a number of energy saving bulbs in the past and any power surge at switch on was shorter than the time it takes my meter to settle on a reading. In other words, I was unable to detect it.
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The problem is, do gooders are so intent in taking us back to the caves that they don't do tests on these bulbs. I am getting fed up of being told what I can or can't do, because of this so called climate change.
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The problem is that people like you propagate myths with no basis in reality. You would have more credibility if you argued about the energy costs of producing the bulbs in the first place, or the environmental costs of disposing of them at the end of their life.