Reflector Systems used in Hella Work Lamps


The Paraboloid Work Lamp

A conventional work lamp has a reflector in the mathematically defined shape of a paraboloid. The reflector captures the light of the bulb and directs this forward to the area to be illuminated.

The specific light distribution pattern is produced by optical lenses and prisms in the profiled cover lens which achieve limited scattering of the beam of light. Effective paraboloid headlamps need a large reflector in order to be able to capture a large amount of light from the bulb.


Paraboloid Work Lamps


Modern Free-Form (FF) Work Lamps

In contrast to the paraboloid work lamps, the Free-Form (FF) reflector does not incorporate a cover lens
that distributes and scatters light. The computer-calculated Free-Form (FF) reflector produces the
required beam pattern.

Free-Form (FF) Work Lamp with H9 Bulbs
(From left) H3, H9

Easy replacement of the H9 bulb without having to open the lamp. Hella is the first supplier worldwide to use H9 bulbs in work lamps. The use of H9 bulbs has important advantages for the operator:

H9 bulbs offer better light output than H3 bulbs. H9 bulbs supply
some 45% more luminous flux.
The bulb is accessible from the outside, which means fast and
easy replacement without tools.


Free-Form (FF) Work Lamps

Advantages of Free-Form (FF) Technology 
Bulb Data
1.  Small Free-Form (FF) reflectors capture more
light from the bulb and achieve a considerably
larger degree of light effectiveness.
2. Much larger beam scattering can be realised
for extremely wide beam patterns.
3.  Homogeneous illumination means more
pleasant working light with soft transitions at the
edges without harsh contrasts.
4.  Minimises installation downtime, power and
maintenance costs.