A ++, A +, A, B, C, D.
All lamps are CE marked, which means that they meet EU safety, health and environmental protection requirements (such as Wee and RoHS).
The Kaiser Idell lamps also has UL certification, which applies to the US market.
Light sources: Incandescent, fluorescent or LED source
Socket: E27 (EU) / E26 (JP + US)
Watt: Max. 250V (EU) / Max. 110V (JP + US)