1) It is the popular model in the HID bixenon series,not like the xenon+xenon series,need 4 ballast to match but only need 2 ballast to fix2.)The competitive price is the powerful reason to attrack people's eyes.3) Color temperature: 4,300 - 12,000k or above4) 12V/24V, 35W/50W available5) Lifetime: 3,200hrs6)Luminous flux: 3,200LM, nearly 3 times than halogen lamps7) Base type: single lamp H1, H3, H4H/L, H7, H8, H9, H10, H11, H13, 9004 (HB1), 9005 (HB3), 9006 (HB4), 9007 (HB5), 880, D2S, D1R, D4C; double lamps H4-HL, H13, 9004, 9007 (with moving), and for motors8) Fit for BMW, BENZ, Honda, Mazda, Lincoln, VW, and Volvo