According to the description, the lamp should be compatible with incandescent lamps. Since the light is to stand at the desk of a child, I wanted no Engergiesparlampen use (because of possible mercury vapors in damage). Surprisingly, stands on the lamp: max. 11 Watt. There is no light bulbs with 11 watts and in the shop me LEDs were discouraged because there is warm even the electronics in the base, possibly too warm. The lamp has in the area of pear no air circulation. After consultation with the seller Hofstein was also confirmed that only Engergiesparlampen may be used. And particularly surprising: in charge of my Fehlkauf is Amazon, because Amazon the item descriptions writes. Very strange, but where shipping and selling on Amazon is not going according to the description, but on Hofstein.