A very important component of the car is the lighting. Battery, which is installed under the hood of the car provides electricity to all the necessary components, including light bulbs. When driving lights are very important, that should be included in the night-time constant, and the day - depending on weather conditions and time of year. 
But, them back later. Do not forget about the rest of the lighting fixtures, which are installed in the car. In the cabin, usually, on the ceiling of one or two light bulbs installed, which are often not used, since their light discomfort to the driver to watch the road - the light from the bulb is reflected from the windshield and covers part of the review. Regardless of the type of light bulbs, still light will interfere, but if you watch any documents, or will have something to write, then the best option is the LED light bulb.
Similarly, for stoplights, LEDs are an excellent option, since it is much easier to see at night, in the rain, in the fog, and if one of the LED stops flashing, then all the rest will still be in working order and be able to specify the car behind riding on, he approaches another vehicle.
However, for front Var, LEDs are still not very good. They are not very bright light output, that does not allow light up the road far, and for this reason they are used as additional designations for the dimensions of the car in daylight and darkness.
But for normal lighting lens beam lens and beam. This special lens, which use xenon bulbs. The lenses can focus light, that the side beams are not blinded riding towards the driver. Also, do not forget about it, that due to the focus of the lens, significantly increases the range of the light beam, and therefore it increases the time for, that react to any obstacle. Or stop before crossing the road - a man.
Turn signals and marker lights, They may well be equipped with LED lights, considering, they are not designed to illuminate the road, then it can work, this is enough, to warn other road users of their intentions. Besides, LED light bulb, and the Xenon also, draw less power from the battery, which means, that it should be less likely to be charged.
