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Is it true that because of high energy use at start-up, compact fluorescent lamps have to remain switched on for 45 minutes before they bring any energy saving at all?

April 26, 2017compact energy fluorescent high Lamps remain start-up

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Is it true that because of high energy use at start-up, compact fluorescent lamps have to remain switched on for 45 minutes before they bring any energy saving at all?

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No. The energy use of compact fluorescent lamps in the first 2 to 3 seconds of their operation is slightly higher, but after that their power uptake is stabilised. In practice, they provide energy savings right from the moment they are switched on.