Remember, this is the minimum. The list shown below includes IES recommended lighting levels for a selection of industrial/commercial spaces. Both of these are measurements for how much light makes it onto a surface. The necessary light brightness differs, according to the room application. It gives these recommendations in the form of average foot-candles and lux values. Lux means lumens per square meter, and foot-candles means lumens per square foot. Room Application or Visual Tasks In your dining room, you’ll want about 30 lumens per square foot on your dining table (you want to see your food, but not examine it), so if your table is 6 x 3 feet, that’s 540 lumens.Keep in mind, however, that these numbers are for typical conditions.
Its special areas may need additional task lighting. Light bulbs and some lighting fixtures carry a specific lumen value. So, using the figure above as an example, you would be lighting for 120 feet based on 12x10 room. However, it depends on your projected activities and tasks. The basic calculation is very simple:

In my case, I wanted my garage lighting to be as bright as possible, so I went with a minimum of 100 lumens per square foot. The number of lumens you need may increase based on how you use your garage. The recommended lumens per square foot range from 70 to 100 LM. However, if you can’t make calculations or quickly need to know how many lumens are needed per square foot for a garage or workshop, you can try the lumens quick guide below for an average estimate: How many lumens per square foot do I need? This worked out to be around 48,000 lumens … Taking a few minutes to determine the recommended lumens per square foot with the method outlined above is ideal. In practical terms, lumens tell you how bright a light bulb is. The higher the lumens, the brighter the bulb. For the average space of 250 square feet, you’ll need roughly 5,000 lumens as your primary light source (20 lumens x 250 square feet). Illuminance is measured in foot candles (ftcd, fc, fcd) or lux (in the metric SI system). Incandescent light bulbs are measured in watts and may not have the lumen measurement on the packaging; for a frame of reference, a 60-watt bulb produces 800 lumens. Lux measurements are roughly 10 times a foot-candle measurement, as a foot-candle is 1 lumen per square foot, and a lux is 1 lumen per square meter. Lighting designers often use lumens per square foot to ensure a home has sufficient lighting.

A foot candle is actually one lumen of light density per square foot; one lux is one lumen per square meter. To figure out the lumens needed based on this figure, you would take the total lumens of the lamp you are considering using and divide it by the total square foot. In the first step of your calculations, you need to choose the type of area and activity that you want to illuminate.

When lighting a room, you light it by suggested lumens per square foot.