How Many 200 Watt Led Lights Will 1 Photocell Feed

How many light fixtures do I need for my warehouse?

We get tons of questions like this and are happy to help. Some of them thinking about light color and height, some of them about fixture spacing. We are happy to help. We thought sharing an example would help you think about all the things we do.

Quick rule of thumb.

Brightness;

14K lumens at 120 degree from 10-15ft.

21K lumens at 120 degree from 14-20ft

35k lumens at 120 degree from 20-30ft

42k+ lumens at 60, 90 or 120 degree above 30

Spacing;

Space them out at the same height as hanging; so 10ft off the ground, space 10ft. 15ft, space out every 15.   Above 25 we need to go closer or use different lenses, reach out to a lighting expert.

Here are some recent examples

Here is the email;

I have a 40x70 warehouse that I will be working on and detailing cars. I want to convert from old lighting to led primarily for brighter lighting and lower energy costs. The lights are currently at 17 feet above floor. I was looking at your 150 watt High Bay UFO lights and you 100 watt high Bay UFO lights. Would this be appropriate? How many would I need and how far apart etc. thank you. Bob

Here is our first answer;

Bob,

Thanks for reaching out. Those are awesome lights so you are on the right track.  At 17 feet high you can go 100 watts or 150 with a 120 wide angle. That is the angle the light comes out at. I usually do not recommend 150 watts until we get closer to 18 feet high and up.  You are right at the cut off.

1.

Do the 150watts high bay lights and use 120 wide which is standard. 14-20 feet we recommend the 150watts.  At 17 feet you can go wider angle and still get good light to the ground. So the 6x3 pattern would give you good coverage. 7x3 for 21 lights for higher brightness.

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If you can run additional wiring, we can also do all of this withdimmable high bay light versions so you can go a bit brighter and adjust down to save energy. You can create a few sections. Maybe dim down half of the warehouse where it's just parked cars and leave the rest full brightness. See our knowledge base and video on 0-10v dimming for more info on these.

2. Use 100 watts High Bay lights and space them out every 8-14 feet (8 for high brightness, 14 for adequate).  A 6x3 pattern for example is 18 lights for basic lighting, or go 7x3 (or 6x4/8x3 depending on wiring) for 21-24 lights to get a medium brightness level.  8x4 for 32 would be very high brightness. So that's just an estimate. Somewhere in there.

21 of the 100 watts in dimmable high bay lights would probably be my recommendation for bright lighting. (without knowing more)

There is bulk pricing on all of this too.  Choice of angle and light color. All inclusive. 5 year Warranty, full liability insurance, USA toll free phone support and no tax outside of CA.

Feel free to give me a call and I can answer any other questions.

Thanks

Bill

Here is a 2nd email;

I have a 30x40 shop and need to know how to light it. The sides are 14ft and the peak is 17ft. What do I use?  Jim R

Here is our 2nd answer;

Jim R

Thanks for reaching out. Our standard shop lighting is always 2 rows of 2 for 4 lights.  Anything from 20-40ft x 20-40ft fits right in there and gets great results. I would recommend 4 of our 150 watt UFO high bay lights. We never want to use less than 4 because we want light coming from at least 2 directions to reduce shadowing. So even on The 20x20 we go to 4, its a bit overkill with lumens but the uniformity is more important. See the image above to see what happens when one light is out, lots of heavy shadowing.

Dan

When in Doubt - Talk to an Expert

So you can see there are so many variables in lighting design that you have to think through lots of options. Number of fixtures, brightness, height, light angle, where you can actually run wiring, etc, etc. There is a whole science called photometrics that does awesome analysis on this. For larger buildings they can do a full design. On something like this it's just not worth it.

This customer went with 21 of the 100 watt LED High Bay lights and emailed us later on to say that they were very pleased.

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Source: https://www.ledlightexpert.com/How-many-light-fixtures-do-I-need-for-my-warehouse_b_7.html

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