Specifications: HD16-22D/4 AC110V HD16-22D/4 AC220V HD16-22D/4 AC380V HD16-22D/2 AC/DC6V HD16-22D/2 AC/DC12V HD16-22D/2 AC/DC24V HD16-22D/2 AC/DC48V HD16-22D/2 AC/DC110V HD16-22D/2 AC/DC220V HD16-22D/2 AC/DC380V HD16-22D/2 AC/DC220VF HD16-22D/2 AC/DC380VF Colors: pure white,pure blue,red, green,yellow,orange, many choices. With "F" means that the discharge lamp can be installed in the capacitance cabinet.