FREE SHIPPING on Orders Over $100! Bulk & Commercial Inquiries handshake icon desktop

Layout Request

Fast and Efficient Lighting Plans for Indoor, Outdoor, and Sign Lighting

Disrtibutor Banner

Photometric Layout FAQs

What is a Photometric Lighting Layout?

Lighting layouts are created using special lighting software that measures the results of a particular light or set of lights in a given space. This is a crucial tool as it provides an accurate result based on the fixture type, number of fixtures, spacing and mounting height. Photometric layouts are versatile in that they can be used to measure the lighting needs for specific applications, including parking lots, signage lighting, area lighting, and lighting for indoor spaces requiring specific lighting levels.

What are the Benefits of Using Photometric Lighting Layouts?

  • The guesswork is taken out of a new or existing build for wattage, number of fixtures, fixture spacing, and mounting height.
  • Multiple samples do not need to be purchased in order to test which fixture will work.
  • Results are guaranteed based on the average footcandle and a ratio of the average and minimum values.
  • Jobs are easier to sell, since there is visual representation of the final result.

What is the Cost and Availability of a Lighting Layout?

HTM Lighting Solutions provides our Photometric Layout services at no additional cost for contractors, electricians, and all HTM-Pro Members. Results are typically available within 1-2 business days of the request, and quotes with our product recommendations are always included with the best price available!

Be sure to view some of our Case Studies for some real-world applications using our layouts!

How To Read A Photometric Lighting Layout

Reading one of our photometric layouts is fairly simple, as we keep the following factors in mind:

Fixture Positioning

The direction and spacing between fixtures are indicated on most layouts requiring specific orientation in a particular project.

Footcandle Readings

Various points can be seen on the layout with an associated number, indicating the average footcandle reading at that point. Multiple points can be used to gauge the average light spread in an area in order to ensure lighting is even where needed.


One of the most important bits of information, the calculation provides datapoints related to the calculation zone, including the average footcandle in an area to ensure the light is bright enough, and the average to minimum footcandle ratio to ensure lighting is even and consistent.

Heat Map

A visual representation of the light spread of an area. This is useful for determining even lighting and avoiding hotspots.

Fixture Schedule

The final element of reading a layout is the fixture schedule, which contains crucial information about the fixture, including the wattage, voltage, lumen output, and number of a fixture type in an area.