Lighting for an Outbuilding

jim-neJuly 28, 2009

Hello- we just put up a pole barn and I need help calculating how much light we will need to install this fall. The building is 40' x 80' and the trusses are 18' high. It is primarily for storage and I plan on having a shop in the corner to crank away on projects. My question is how much light (lumens or footcandles) do I need per square foot? From researching it looks like a typical kitchen is 30-40 lumens per sq ft, living rooms are 15-20 lumens so I *think* 10-15 lumens per sq ft sounds reasonable. From this I think I need 40x80x10 (size * lumens) and get 32000 lumens on the floor. Since my lightning will be 18' above how do I calculate how much light do I need to install? I plan on using HPS fixtures and my best guess is 8 fixtures pumping out 400/600 Watts/ea (50000 to 90000 lumens per fixture).


Thank you for reporting this comment. Undo

We use foot candles for most calculations and like 75 for 'shop work', 100 for 'fine work'. Fine work is something like sewing. For storage maybe 35 foot candles will be OK, but try for 75 for the shop area.

We normally take a drawing to the supply house and tell them what our needs are and they do a take off for free. It will include types of fixtures and location. We rarely use exactly what they provide, but it is a good start to get things where we want them.

    Bookmark   July 29, 2009 at 8:59AM
Sign Up to comment
More Discussions
Entry light for awkward design
What should we do for a light at the front door? It...
MR16 vs GU10
What is the difference between MR16 and GU10 halogen...
is there any solution for this problem?
Have a new ceiling fan in the kitchen which I bought...
Recessed Lighting Layout for Kitchen
Hi, everyone. I know this is asked all the time, but...
Disappointed with my LED recessed lights ... what now?
My LED recessed lights (Cree 6'' 2700K) were installed...
Sponsored Products
Holtkoetter | Bernie Turbo Halogen Low Voltage Swing-Arm Wall Sconce No. 8193
$718.00 | YLighting
angelo:HOME Fulton 8522-5H Chandelier - Orange - 8522-5H
$158.00 | Hayneedle
Hudson Valley Mill Valley Modern Contempo Bath Vanity Light
Warehouse of Tiffany Mission-style Light Fixture
Design House Ceiling Fans Drake 52 in. 4-Light Oil Rubbed Bronze Ceiling Fan
Home Depot
Mini Star Chrome Two-Light Bath Fixture with Royal Cut Bordeaux Red Crystal and
$300.00 | Bellacor
Vienna Full Spectrum Cesenna 5" High Crystal Wall Sconce
$79.99 | Lamps Plus
Classical Style Copper Glazing Flush Mount in Octagon Shape
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™