Commercial Lighting Watts Per Square Foot

Included in the watt measurement is all power consumed by light fixtures ballasts controls transformers etc.

Commercial lighting watts per square foot.

You would need 4 300 watt fixtures to light the shop. Commercial spaces like retail stores can utilize many of the same light types but they may not require the same number. Please choose proper unit of your room area to help us count led lights lux and watts calculation required per square foot meter inch. In our example 650 watts divided by 192 89 square feet is 3 37 watts per square feet.

Lighting power density is the amount of power used by lighting per unit of building area. The formula would look like this. You can assume a laundry circuit isn t a continuous load and that commercial laundry circuits are rated 1 500va unless noted otherwise in the project drawings or exam question. In these spaces you ll want to look for shop lights wraparound lights led troffers and high bay lights that have higher output.

Cia world fact book appendix g. Here s the breakdown of how that energy is used. Essentially if the component or device is involved in lighting it must be. 3 200 x 50 160 000.

This gives you the total number of fixtures that are ideal for your space. According to the department of energy doe the average number of kilowatt hours per square foot for a commercial building is approximately 22 5. Watt per square feet method as per ashrae ansi iesna 90 1 we have two cases for lighting design by using watt per square feet method which are. Learn about how commercial led lights can dramatically reduce energy costs for different building types relative to the standard ashrae watts per sq ft 484 588 5401 facebook.

The nec requires a minimum load per square foot for general lighting depending on the type of occupancy table 220 3 a. Lighting design basics and terminology part two. Multiply the shop s square footage by the suggested foot candle requirement and then divide that number by the fixture s lumen output. Approximately 8 kwh square foot are consumed by refrigeration equipment.

This lumen calculation formula is using predefined standard lux levels required for different room types. Industrial spaces often require more lumens per square foot because of the complicated potentially dangerous nature of work being performed. Now is where the thinking comes in. Today i will explain the third method for lighting design which is watt per square feet method as follows.

In the united states lpd is measured in watts per square foot. Consider that light spreads and gets dimmer the farther away it.