1.Power.

If you decide to purchase an energy -saving lamp, pay attention to some nuances:

1.Power. You will probably be surprised when you see the power range of energy -saving lamps, it ranges from 3 to 90 watts, and the latter in terms of brightness correspond to an incandescent lamp of 450 watts. This difference is the result of high efficiency. To find out what power of the energy -saving lamp you need to replace, you need to divide the power of a regular lamp by 5. So, an incandescent lamp of 100 watts will successfully replace an energy -saving lamp of 20 watts.