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Lumens For Garage Lighting

Old 07-14-2016, 09:06 PM
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Default Lumens For Garage Lighting

I have to light my new garage. I want it well lit. How many lumens sq ft should I be looking at? The ceiling is 8'. I was thinking 12 4' lights. 4 units per bay. 5500 lumens per unit. That's 66,000 lumens for the 864 sq ft garage. Sound good?
Old 07-15-2016, 03:36 AM
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I would ask the experts here: http://www.garagejournal.com/forum/f...splay.php?f=30

My detached garage has approx 88 lumens/sq ft but the off-white floor, walls, and white ceiling help.

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Old 07-15-2016, 03:49 AM
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Looks like I would have 76 lumens per sq ft. I guess that would suffice? Thanks for the pic!
Old 07-15-2016, 06:55 AM
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Also account for fixture placement as best as possible. Nothing worse than having a garage door or two open and having it block all the light fixtures in that area.
Old 07-15-2016, 07:48 AM
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I use both fluorescent and can lights in my garage. The cans light up doorways, work benches, etc.
Old 07-15-2016, 08:00 AM
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Originally Posted by ThreeLittleFish View Post
I have to light my new garage. I want it well lit. How many lumens sq ft should I be looking at? The ceiling is 8'. I was thinking 12 4' lights. 4 units per bay. 5500 lumens per unit. That's 66,000 lumens for the 864 sq ft garage. Sound good?

I cant help you with how many, but I just switched out all my old fluorescent fixtures that were basically shop lights mounted flush to the ceiling with new LED shop lights mounted the same way. I got them from Sams Club. Think they were $40 a pop. I can not believe what a difference it made. My garage is lit up light Clark Griswold's house now.

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Old 07-15-2016, 08:10 AM
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Great post and info. Our garage will be about 1100 sq ft and I didn't even think of lighting till now. LED seems best route.
Old 07-15-2016, 10:26 AM
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80 per sq ft would be normal for that kind of space.
Old 07-15-2016, 10:49 AM
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it depends upon what you want to do with it - mine doubles as a woodshop when the cars aren't in it, and for car waxing and work sometimes when they are; and in a 2 bay 20' x 20' garage (9' high) I have 18 4' double 40w bulb fluorescents - 2 rows of 3 lights in each bay that are 6' apart on center spaced 18" from the door wall and 18" apart along the row, with 4 4' lights 3" apart that run the entire length of the workbench at the head of the garage 18" from the wall and the same from the 4 rows plus 2 4' lights 3" apart over the workbench and tool boxes on the right side - the 9' x 20' bays are offset 2' to the left.
They are run off four different switches, so I can have the middle 2 in each bay on, the outer 4 in each bay on, the 4 across the back on or the 2 above the work bench & tool area on in any combination.
I wouldn't want any less light than this. The calculations show 220 lumens psqf.
Old 07-15-2016, 12:07 PM
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Led's are almost instant on and full bright, even in cold temps. There are architecture standards for lighting applications. Look it up.
Old 07-15-2016, 09:04 PM
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I have 16 four-tube F32T8 fixtures, in a 28 x 46 foot space with 10 foot ceiling, for about 140 lumens/sq foot. I think this is about right for a workshop. I wouldn't want any less. My target was 150 lumens/sq ft which is recommended for such spaces based on architectural recommendations. Different types of tubes give off 2800-3000 lumens/tube.
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Old 07-15-2016, 11:32 PM
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I don't really want to do anything special in the garage. It's not going to be a workshop. Just general lighting. Occasionally do some maintenance on my cars/equipment. Nice shop Scout!
Old 07-16-2016, 05:41 AM
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Originally Posted by Buoy Scout View Post
I have 16 four-tube F32T8 fixtures, in a 28 x 46 foot space with 10 foot ceiling, for about 140 lumens/sq foot. I think this is about right for a workshop. I wouldn't want any less. My target was 150 lumens/sq ft which is recommended for such spaces based on architectural recommendations. Different types of tubes give off 2800-3000 lumens/tube.
WOW that's one hellva shop there.
Old 07-16-2016, 07:28 AM
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Check out Torchstar LED's, LED light is the only way to go,get the 6000K daylight leds and save 2/3 lighting energy costs.
Old 07-16-2016, 07:12 PM
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When I size LED fixtures I measure by footcandles (fc) on the floor. Using the daylight LED's as mentioned above is great for color accuracy. Typical fc for a well lit garage would be approximately 40-45fc on the floor.

If you can give me the building length, width, mounting height of the fixtures I will try to do a layout showing the amount of fc and give you an idea of where to hang them. Are there any obstructions that block the light from spreading, if so I will need to know where the obstructions are within the room.
Old 07-16-2016, 10:48 PM
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Is there any rope lighting led options that work OK? I'm thinking of replacing fluorescent valance lights with a long rope light for a living room. The lights themselves would be hidden.
Old 07-17-2016, 02:31 AM
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My garage is 24X36. Ceiling height is 9'6". The only obstruction would be the open garage doors. I actually exchanged the original 12 fixtures I bought and bought 12 fixtures with 8070 lumens. 5000K.

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Old 07-17-2016, 03:01 AM
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Subscribed. Another THT gem. Just starting my garage build. I'll be looking for exterior security and general exterior lighting recommendations too.
Old 07-17-2016, 05:02 AM
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I looked at LED vs. fluorescent for my shop and decided on fluorescent. The fixtures were much less expensive for a given amount of light. LEDs are more efficient than fluorescent, but the difference for my application didn't makes sense. Unless the lights are on more than a few hours/day, payback is a very long time. I do have LED exterior lighting that is on dawn-to-dusk.

I've gradually been converting lighting in the house to LED from CFLs now that LED bulbs have come way down in price. Last time I was in Lowes, there were far more LED bulbs than CFLs. I imagine in another year or two, CFLs will be all but gone.

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