Author Archive

Warehouse lighting solutions

Lighting solutions for a warehouse can be challenging due to the wide variety of work performed within a fixed space. Most warehouse operations include a number of functions that each require their own lighting design to encourage peak performance as well as reduce the risk for accidents or injury. Beyond performance and safety, a properly illuminated warehouse can lower costs, saving money across the board. Read more…


Industrial Lighting Solutions For All Environments

When thinking of lighting solutions for industrial applications, it is important to remember that many locations are not ideal. There are plenty of occasions where companies needing industrial lighting solutions have to work in conditions that are less than favorable. They may include wet locations or hazardous areas that require special attention. For this reason it is important to team up with a industrial lighting provider that is aware of your special needs and has the knowledge and expertise to get your company outfitted with products designed for the intended environment. Read more…

Industrial Lighting Solutions Must Make Financial Sense

There are plenty of people both in the business world and everyday citizens that are jumping on board the environmentally friendly band wagon. While most of us can agree that making changes that reduce our carbon footprints should be done whenever possible, going green must also make financial sense in order to be affordable. This becomes especially true when making environmentally responsible choices on a large scale. For businesses that are in charge of running warehouses and large industrial buildings, energy efficiency is key to reducing their energy expenses. Unlike residential customers who spend a minimal amount of time comparing energy figures, these businesses spend plenty of time and thousands of dollars to keep their buildings up and running. Read more…

Lighting Kelvin Temp to Use For What

I find that bulb color to use in t8, T5HO’s and Fluorescent lighting in general rule of thumb would be

3500k Residential Lighting

Kitchens and Baths

4100k Commercial

Office Lighting Applications  

5000k Industrial

Warhouse, Manufacturing, Production Lines, Detail Work

6500k True Spectrum

Paint Booths

Defining High Bay Lights

(Hid) High Intensity Discharge High Bay Fixtures including the newest technology Pulse Start Metal Halide, and older Technology of High Pressure Sodium (HPS) and Metal Halide (MH) have been the lighting warehouses, manufacturing, garages, hangers, barns and other commercial, retail and industrial locations. Today with newer Pulse Start Metal Halide the lighting has become even more energy efficient and has greater lamp life (i.e. a 320 Pulse Start Metal Halide has the equivalent light output of a 400 watt Metal Halide but uses 80 less watts). In environments where dirt is substantial, or corrosive these High Intensity Discharge Fixtures are ideal. While Linear Fluorescent High Bays are gaining market share in areas, it is unlikely to replace MH in locations.

  • High Pressure Sodium or Pulse Start Metal Halide
  • Offered with an Aluminum or Acrylic reflector (15% Uplight)
  • 100-1000w HPS or PSMH
  • Most of our Fixtures us Major US Brand Ballasts and Lamps
  • Open Rated Bulb and Socket on all Metal Halide


Here is a great place to find these fixtures

Categories: High Bay Lights

How Lighting is Changing Even to Your Eye

Measuring Lumens —What Are “Pupil Lumens”?

How people see and are psychologically impacted by lighting has been a subject of much study and discussion for years. Describing light as “lumen output” and measuring it as “foot candles” on a work plane have been the traditional ways of describing and defining how much light is required to perform a variety of tasks. However, that is being re-examined based on results of studies on visual performance and the psychological impacts of lighting. Additionally, the “color rendering index” (CRI) and correlated color temperature (CCT) describe the quality of the light (relating to how true colors appear compared to under a noon north sky on a clear day). As lighting technology evolves into various types and colors, simply measuring the lumens proves not to be fully adequate in predicting how well people can see. An excellent example is the low-sodium lamp which produces many lumens, but only two colors (yellow and gray); the ability to make out details—beyond shapes of objects—is lost under this light source. Different light sources produce light in different spectral ranges and there is a wide variety of spectral output available in fluorescent lamps.

Vision itself is affected by many factors, from light intensity, distribution, color, and contrast, as well as reflections, glare, air quality, motion of subjects and viewers, and more. Our eyes use different parts to see in bright light and low light conditions. The eye contains cones and rods which were thought to work in opposite conditions. Cones provide color vision and fine detail (photopic) in bright light and rods take over in dim light (scotopic). In bright light our pupils contract allowing more detail to be perceived, while depth of field and perceived brightness also increase. In low light our eyes dilate to allow more light in.

Light meters and recommended light levels for tasks have traditionally been calibrated for daytime viewing, and general interior lighting, based on the photopic response. However, studies are indicating that the scotopic vision is more involved in interior lighting than thought, and affects pupil size. At recent international conferences, some presenters encouraged designers to specify the photopic/scotopic (P/S) ratio of lamps when selecting them in order to get better design, efficiency, and better vision for occupants.

Sam Berman—formerly with the Lighting Systems Research Group at Lawrence Berkeley Laboratory and a major supporter of the importance of the P/S ratio in lighting selection— developed a conversion factor that applies the P/S ratio to lumen output of various light sources, and then expresses the effective lumens the eye will perceive for vision based on the size of the pupil and the effect on vision ( Table 1 ). Some lamps, like low-pressure sodium, lose most of their output using this method, while others like high-quality fluorescent lamps gain substantially.

Induction lamps are basically equivalent to high-quality fluorescent lamps with a CRI of 80 and a color temperature of 4100K. Berman’s table suggests that, while the T-8 4100K lamp has rated lumens of 90 per watt, the pupil (effective) lumens are actually 145 per watt. If contrast and distribution are controlled, this suggests that fewer watts are needed to provide good vision than rated lumen output would suggest, meaning energy savings will result.

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