Bought as a replacement for a similar Osram lamp with energy saving lamp the Varta. This never went on in cold temperatures and had to be replaced. I am excited about the Varta. Only 3 instead of 4 batteries and fuel-efficient LED instead of fluorescent bulb. The light that really convinced me. Very convenient hook to hang the lamp to the floor upwards. Use the lamp as the illumination at the stable and am even very happy in the power saving setting with the brightness. In the dark, a green LED will flash so that you can find the switch. When you first print the lamp is on 100%, with the second pressure to go into power saving mode. For a room with about 16sqm, it is sufficient light.