@Imran ali khan A 55 watt Halogen lamp draws a constant 10 Amps, while an HID lamp in steady state draws in 3-4 Amps (50-60% less power).So I think Power consumption is not a problem , Until you car is running a decent kms. --- Double Post Merged, Apr 5, 2016 --- @kunwar.g I totally disagre your with your 35W+35W=70W information. Modern SLI batteries are lead-acid type and provide 12.6 volts of direct current, nominally 12V. The battery is actually six small batteries, or cells, connected in series.The alternator, which includes a voltage regulator to keep the output between 13.5 and 14.5V. HID headlamp burners produce between 2,800 and 3,500 lumens from between 35 and 38 watts of electrical power, while halogen filament headlamp bulbs produce between 700 and 2,100 lumens from between 40 and 72 watts at 12.8 V. The highest-intensity halogen lamps, H9 and HIR1, produce 2100 to 2530 lumens from approximately 70 watts at 13.2 volts. A D2S HID burner produces 3200 lumens from approximately 42 watts during stable operation.The reduced power consumption means less fuel consumption, with resultant less CO2 emission per vehicle fitted with HID lighting (1.3 g/km assuming that 30% of engine running time is with the lights on). --- Double Post Merged, Apr 5, 2016 --- A 55 watt Halogen lamp draws a constant 10 Amps, while an HID lamp in steady state draws in 3-4 Amps (50-60% less power).