headlamp LED Suitable for GB3836.1,2,3-2000 ,IEC60079 standard request. headlamp LEDApplication1.Used in Zone 1 and Zone 2 dangerous place ... (Φ,mm)Inlet's thread(G")Lamp socketE-markBCD-250IP56,WF110-14 3/4E27ExedIIBT4Supplied with light sourceLamp voltage Self-ballasted mercury vapor ... lampRated voltage(V)220Rated power(W)250300175,250150,250175,250 headlamp LED