The best way to protect your Hella driving lights from damage is to use an authentic Hella protective cover - only Hella covers are designed to securely protect Hella lamps.
The high standard of Hella Auxillary Driving lamps is confirmed time and again in independent tests of major international automotive magazines.
Before a new Hella design is passed for production and sale it has to pass stringent endurance tests.
1. Function even when driving in adverse conditions and in extreme terrain.
Spraying with mud and water to simulate off road and cross country driving.
2. Withstand harsh vibration and shock.
Vibration testing with random as well as at fixed frequencies known to stress materials. This simulated tough road conditions such as cobblestone pavement and potholes.
3. Freezing cold and fierce heat are no problem.
The Driving Lamps are subjected to extreme temperature variations between -40 degrees C to + 80 degrees C.
4. Watertight even in extreme weather.
The driving lamps are subjected to water spray at pressures of 4 bar to simulate driving through torrential rain.
1. Always get a professional alignment after you change a headlamp, driving lamp or replace a bulb.
2. Always use a bulb of the recommended wattage in your driving lamps. Using a higher wattage bulb than
recommended will not increase the light output very much and may produce too much heat. In some cases this may cause damage to the lamps.
3. If you are blowing bulbs regularly, and/or your lights are not as bright as they used to be, try fitting a relay. A voltage drop of just 1 volt, equates to a loss of 20% of light output. 12V bulbs are designed to operate at 13.5V.
4. Don’t forget to remove the driving lamp protective covers before turning your lights on, or use clear protective covers which can be left on at all times.
Lights with Parabolic Reflector Systems
These Lights are designed with a reflector in the mathematically defined shape of a paraboloid. The reflector captures the luminous flux emitted by the bulb and reflects this forward as an almost parallel light beam.
The specific light distribution is produced by optical lenses and prisms in the profiled cover lens which precisely directs the light to the area to be illuminated. Good optic design produces an evenly lit surface whereas spotty appearance is the result of optics of lesser quality. Very efficient headlamps with Parabolic Reflector Systems require a large reflector in order to capture the maximum luminous flux from the bulb.
Lights with Free-Form (FF) Reflector Technology
Lights incorporating Free-Form (FF) Technology are based on complex mathematical calculations. Over 50,000 individual surfaces of the reflector are calculated and formed to precisely reflect the light to the road in front of the vehicle.
The outer cover lens contains minimal optic elements. A well designed headlight based on Free-Form (FF) Technology produces a very evenly lit area in front of the vehicle which significantly contributes to safer driving.
The functional principle of a DE ‘Diaxial Ellipsoid’ lamp is similar to that of a slide projector. An ellipsoid Free-Form (FF) reflector directs the light to a focused glass lens, which bundles and projects it onto the road. A shield positioned between the reflector and the lens provide a very sharp cut-off. The result - concentrated light output with a clear cut-off ensuring a smooth light distribution with very little stray light. DE Technology allows smaller dimensions with a higher luminance compared to a parabolic lamp.
Pencil Beam (for long-range illumination)
The Pencil Beam driving lamp is designed for maximum long-range illumination, providing improved visibility of objects and traffic situations further in the distance. Particularly suitable for off-road vehicles – when objects further in the distance must be recognised quickly to maximise reaction time for the driver.
Spread Beam (for a full field of vision)
The Spread Beam driving lamp provides good illumination of both – the area immediately in front of the vehicle and the distance ahead. Particularly suitable for road vehicles, such as trucks and buses – when fatigue-free driving is more important than recognising objects in the distance.
Hella Fog Lamps (for safe driving in inclement weather)
Fog, rain or snow can reflect the light of standard driving lights back into your eyes, creating a dangerous glare that makes it difficult to recognise hidden hazards.
Hella fog lamps are equipped with specially designed reflectors, which evenly illuminate the width of the road,
providing you with a wide path of light for more safety through clearer visibility. Particularly suitable for any vehicle driving through humid or moist areas where fog, rain or snow is common.
Isolux charts represent the beam pattern and the distance illuminated on a flat road surface using a single lamp. The colour shades represent the distance in metres from the lamp. The dark blue shade indicates an illumination level of one Lux (320 metres in the above diagram).
Hella’s technical data is produced from Hella’s own test facilities, laboratories and light tunnels. One Lux represents the intensity of the light of the full moon (under clear atmospheric conditions) or sufficient light by which to read a newspaper.