Tag Archives: kit

LED Retrofit Kit

3 Easy Steps: Pick the Right LED Retrofit Kit vs HID / HPS

How do you choose the right LED model to retrofit HID fixtures?  How do you know X watt of LED really equals 400 watt of HID?  You need to spec the right wattage, the right product, every time.  Follow these easy steps to spec the right product every time and close more projects faster with each decision maker.

LED Retrofit Kit

LED retrofit kits replace HID and HPS lamps, but how do you chose the right model?

3 Simple Steps to Compare & Spec LED to HID Metal Halide

  1. Mean lumens of HID* x Efficiency of Fixture** = Effective Lumens
  2. Match HID fixture effective lumens with LED retrofit kit or fixture
  3. Select the matching LED retrofit kit and quote your customer

3 Simple Steps to Compare & Spec LED to HPS High Pressure Sodium

  1. Mean lumens of HPS* x Efficiency of Fixture** x 0.38 for perceived lumens = Effective (Perceived) Lumens
  2. Match HPS fixture effective lumens with LED retrofit kit or fixture
  3. Select the matching LED retrofit kit and quote your customer

Example: 250 Watt HID high bay project

250W HID = 21,250lm x 0.65 (mean lumen calculation) x 0.65 fixture efficiency = 8,978 effective lumens per fixture

Our 80 Watt LED Retrofit Kit matches perfectly to replace this 250W HID for this example.

Note: Mean lumens vary per manufacturer and each fixture has a unique efficiency value.  While many people use somewhere between .6~.7 efficiency for high bays and .65 to .7 for shoebox fixtures – much higher efficiency reflectors exist.  The above is only an example and exact data is available with each respective fixture.

For many lighting projects, specking the right LED retrofit solution replacing metal halide HID is this simple.  For more detailed comparisons, Green Lighting LED has IES files and can run photometric layouts as a free service for any energy saving project.