No need to remain on to save energy 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?
It is not true that energy saving lamps do not provide energy savings when switched on only briefly. 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 compared to incandescent bulbs right from the moment they are switched on. Nevertheless, compact fluorescent lamps might not be the proper choices for some applications. If the lamp is switched on both briefly and rarely, the energy savings will counterbalance the higher purchase price of the lamp only very slowly, over several years or even decades. In such a case the much cheaper improved incandescent bulbs with halogen technology should be used. If the lamp is switched on briefly and frequently, it may reduce the lifetime in the case of some compact fluorescent lamps. This functionality is also addressed by the regulation, requiring that compact fluorescent lamps should reach the claime
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