If the ratio is seen power consumption about light output, you have to wonder why you still operates a conventional bulb or tube in his house. Since there are only 3 reasons: - For the version in question, no LED lamps is offered - For interior lighting is no corresponding LichtßFarbton (eg "warm") offered - Or there's only Chinese cheap products with a very short lifespan. Now I have tried for the first time after some research the make sebson and am very satisfied. The light was described as warm-white and I find it very enjoyable. The light output is very even. This bulb is described by sebson as equivalent to a 25W bulb. I had been in the air the same number 40 W bulbs. The LED equivalent thereto has not been offered. Nevertheless, I feel the light output to be fairly equivalent. If now keep these LED bulbs (other than the so-called energy saving bulbs) even long, I am 100% satisfied, which is not so common in today's products.