Lumens Required Per Room Type

Illumination can be calculated as.

Lumens required per room type.

φ l luminance per lamp lumen. For example for a 120 square foot room with a single overhead fixture with two light bulbs each producing 800 lumens. E illumination lux lumen m 2. E φ l c u l lf a l 2 where.

For example a 100 square foot living room which needs 10 20 foot candles. If you re curious to know how much light a room is getting simply add up the lumens of all the light bulbs in the room and then divide by the room s square footage to find the lumens per square foot. Then choose the type of a light bulb you want to use. In these spaces you ll want to look for shop lights wraparound lights led troffers and high bay lights that have higher output.

This lumen calculation formula is using predefined standard lux levels required for different room types. Knowing how many lamps you need to adequately illuminate a room or space can be tricky. Determine the needed lumens a lumen is a unit measurement of light. Please choose proper unit of your room area to help us count led lights lux and watts calculation required per square foot meter inch.

Industrial spaces often require more lumens per square foot because of the complicated potentially dangerous nature of work being performed. Suppose your shop has a total square footage of 1 800 square feet and you want a lighting level of 30 lumens per square foot. To determine the needed lumens you will need to multiply your room square footage by your room foot candle requirement. Multiply the square footage by the desired lighting intensity in foot candles per square foot.

Our room example is a living room which requires 15 lumens per square foot. For example a 100 square foot living room which needs 10 20 foot candles will need 1 000 2 000 lumens. A l area per lamp m 2. Commercial spaces like retail stores can utilize many of the same light types but they may not require the same number.

Result may defer according to spacing layout of led lights and position from wall. C u coefficient of utilization. Let s assume you re using a standard bulb that emits 800 lumens for the kitchen and small led lights that emit 200 lumens each above. The total lumens lighting required are equal to 1 800 square feet times 30 foot candles per square foot or 54 000 lumens.

To calculate the lumens required to light the same room we used in our earlier post just multiply the square feet of the room by the lumens per square foot required for the room type. L lf light loss factor. L 108 10 1080 lumens. 10 incandescent lamps of 500 w 10600 lumens per lamp are used in an area of 50 m 2.

L 538 2 4 1291 lumens.