The light output is higher with H7 systems than with the H4 ones because two lamps interact. There are two lamp base plates available in the headlamp.ĭifference between H4 and H7 headlights: Which is better?.The lamp has a single filament in the bulb housing.You can recognise an H7 system by the following features: The great advantage of the H7 design is that when the high beam is activated, the area directly in front of the vehicle is also well illuminated because the low beam is not switched off as with the H4 lamp, but switched on. The reflectors in the headlamp are also precisely adjusted to the position of the filaments in the two bulbs so that the light beam is cast correctly in front of the vehicle according to the "low beam" or "high beam" setting. When the low beam is switched on, one lamp lights up when the high beam is activated, the second lamp is switched on. This means that the vehicle needs two H7 lamps per headlamp. But the technical construction is fundamentally different because the H7 lamp has only one filament. The H7 lamp is a further development of the H4 lamp. There is only one lamp base plate available in the headlamp.The lamp has two filaments in the bulb housing.
You can recognise an H4 system by the following features:
Nowadays, modern H4 lamps are usually available as halogen bulbs. The reflectors in the headlamp are precisely adjusted to the position of the filaments in the lamp so that the light cone is thrown in front of the vehicle when the low beam is activated and then further forward again when the high beam is on. If you switch on the low beam, one filament lights up accordingly if you activate the high beam, the other one glows. This simply means that there are two filaments in the bulb: one for the low beam and one for the high beam. H4 lamps used to be the standard light sources in vehicles.
0 kommentar(er)
