Cetus - Light Quality Comparison

Cetus performs in comparative high bay light design modelling

How can a 135 watt light produce greater lux levels at the workplane than a 400 watt light?

The answer is in the targeted light delivery via integrated optical lenses.The modelling output images tell the story.


Figure 1: Light model design comparison between 135W Cetus 3 module & 400W Metal Halide high bay

The elevation view image above shows on the left an average illumination level of 144 lux at floor level for the Cetus light from an 8m ceiling height at 8 m spacing, compared with an average of 142 lux from a good quality generic 400W metal halide light on the right. Illumination on the vertical surfaces is spread more evenly on the left Cetus image, as indicated by the yellow lux markings on the pallets.For the Cetus, the range is 77 at base and 92 on the top rack, as opposed to a more uneven distribution for the metal halide of 71 to 294 lux. 


Figure 2: Light model design comparison between 135W Cetus 3 module & 400W Mercury Vapour lights

The 400w mercury vapour light output comparison shown in Figure 2 is  more stark, with only 85 lux average at the floor level, and a wider variation of light spread on the vertical surface of 42 on bottom & 204 lux on top racks.  

Light model testing parameters

Enlighten commissioned an independent lighting designer to model a comparison of light outputs between the 3 module Cetus LED light with a lensing configuration of 60/120/60 degrees and generic 400w metal halide and mercury vapour high bay lights in typical warehouse racking configurations.

For a lighting-designer, the advantage of using the Cetus is the flexibility of it's modular design. Using the individual module IES files instead of the whole luminaire, is like having multiple fixtures to "shape" the light with, rather than only one.

Enlighten response

"We are delighted with these results, as we have designed the Cetus light with tailored functionality and these lighting design models support our success in delivering a more targeted light output", said David Bird, Sales Executive, Enlighten.

"The spread of light from the Cetus enables the packaging labels & documentation to be read consistently from the bottom to the top racks up to a mounting height of 8 m, with reduced effect of glare and shadowing. Another customer benefit is that the product bar code laser scanner can better distinguish between the black & white of the bar code & QR code configurations due to the more even distribution of light." said Mr Bird.

For consulting lighting designers login here for secure downloads access to individual Cetus light module ies files for your tailored project designs.

This story was featured in one of our quarterly "enLighten Me" newsletters… Go to Newsletter