Spotlights well, burned lamps after 2 hours of operation

The radiator is really not bad for the price. He is quite stable on the tripod, the height can be adjusted, generally the structure was simple and fast super easy. The luminosity is of course extremely with 2 x 500W. I have therefore a room with about 25m² (for coloring) brightly lit. The lamp housings are thereby very hot but what with such lamps has been designed for normal. So now the negative: after about 2 hours of operation burned from a halogen bulb. Begets grade of good quality. Now 2 x Paulmann are indoors (with 400 W - I know there is no difference of the brightness and 200W lower consumption on top of that !!). The radiator can I still highly recommend it. Dispatch handling course Amazon exemplary again!