The light should replace an old cellar lamp with 40W incandescent bulb. And that's what she does. The luminous flux I have not measured it, but subjectively adjusts the brightness. For durability, I can not say anything after the short period of use. Annoying is that the light source is not provided for exchange. So this fall, one can dispose of the whole lamp. If the service life is 15,000 hours would be to get over (with respect to the price). For switching frequency unfortunately I could not find any information. The delay is slightly longer than an incandescent bulb, an estimated total of the lamp met my expectations so far fully! Whether at the price of sacrificing durability must be made is yet to be seen.
