June 1, 2021 Wessel Nuwenhof

Direct lens vs indirect lens, what effect does this have for your work lighting?

How you experience your workplace will be determined in part by your lighting setup. Factors such as the proper adjustment of the work lamps, choosing the right place and height are all involved in the creation of a homogeneously lit workplace. During the day, you can of course go out with the sunshine (especially with these days), however, in the evening hours a pleasantly lit work environment is still important for efficiency. Lamps have different techniques for optimizing their light beam. What is pleasant for your application may be unworkable for someone else. A distinction is generally made between three types of light bundles: direct, indirect and diffused light.

LED werklamp met fish eye lens en rft lenstechniek

A fish-eye lens work lamp and an RFT work lamp

A work lamp with direct light

In a direct lens work light, the LEDs shine directly on the surface to be illuminated. In this process, little to no filtering is used. The only - practically negligible - filtering is the translucent, unprocessed protective glass.  Direct light therefore has a clear purpose and is therefore also used to illuminate specific spots. Another name for this is spot light.  Characteristic of light sources with a direct beam is the often concentrated angle of radiation. Because of this concentrated beam angle the risk of glare is greatest. Looking directly into the lamp can cause serious damage to your eyes.

An example of a worklight where the LEDs are directly placed is the TRALERT® optimus series. This powerful series of work lights has a very high lumen level with a specially developed Fish-Eye lens technology. By combining the directly positioned LEDs with this fish-eye lens, an extremely powerful light beam is created. The lens ensures that the light is distributed correctly.

You can find the reversed effect if you sit down in the sun with a magnifying glass and shine the beam on a newspaper or other surface. With proper posture and height, you are able to shine the sun's light in such a concentrated way that you can burn a hole in the newspaper. You can use the fish-eye lens to see partly the same thing, but vice versa or to spread the light.

Featured direct beam LED worklight

TRE303P0403: LED Worklight 48 Watt

2850 lumens in a relatively small housing
Equipped with a Deutsch connector
IP68 (Waterproof)
Compact and bright light image

The directly placed LEDs give a bright light image and a good concentrated light distribution. The lamp is equipped with a robust housing, the 16 LEDs produce heat and this is dissipated by the cooling ribs on the rear of the housing. This ensures a long life compared to competing lamps with a flatter housing.

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LED werklamp 48w watt

A work lamp with indirect light

In the case of a worklight where 'indirect light' is applicable, in 9 out of 10 cases a special lens is used. These lenses should distribute the light image optimally in order to create a pleasant beam of light. If you look closely at the TRSW12275FB lamp, for example, you can see that the LEDs are placed horizontally instead of directly. The RFT lens is incorporated so that, by means of micro-mirrors, the light beam is optimally distributed. This also makes this lamp generally and widely applicable. What you find more pleasant to work with is of course up to you. We would like to invite you to test both lamps in our lightroom.

As a test of the sum, we have now had the TRSW12275FB underwater continuously for 3 years. To this day, the lamp works without any problems. On average, we get less than 1% return from this worklight, so this powerhouse may also be of interest to your vehicle.

LED werklamp geschikt voor onderwater

The trsw12275fb underwater

Diffused light in working lights

Diffused light can often be found in lamps that incorporate milk glass. Another name for milk glass is 'the opal lens'. This is because the color of this glass is very similar to an opal stone. Because this lens is not translucent, the light is evenly distributed. The result is an even and filtered light image. As a result, the room is equally illuminated everywhere.

Because diffused lighting has virtually no shadows or reflections, this type of lighting is often used as reversing decorative or ambient lighting. Depending on the type of lamp and intended application, this type of lighting can be combined with direct or indirect lighting.

Direct, indirect and diffused light image in work lamps

Direct, indirect and diffused light image in work lamps

Choose the work light that suits you with TRALERT®.

The correct application of your work lighting is important, as we at TRALERT® know only too well.  We will be happy to advise you and think along with you about how to equip your vehicles with good, durable LED lights. Contact us for the best advice. Our specialists and technical service will be pleased to help you. Are you a professional yourself and do you know exactly what you need? Then check out our dealer portal for the current range of worklights.