Recessed Lights Per Square Foot

This lumen calculation formula is using predefined standard lux levels required for different room types.

Recessed lights per square foot. A foot candle is how bright a light is one foot away from its source. Determine the foot candles by room type or room purpose. Use the recessed lighting calculator on this page to calculate the placement and spacing for general lighting in a room. You can use the calculator on this page to get an idea of how many lights a room will need.

Simply select one of the options from the list and our lighting calculator will automatically determine the optimal level of illumination in lux or foot candles that is how much. Commercial spaces like retail stores can utilize many of the same light types but they may not require the same number. In these spaces you ll want to look for shop lights wraparound lights led troffers and high bay lights that have higher output. How many lumens per square foot do i need.

Tip always use at least two recessed lights even if the calculation calls for only one and choose bulbs. Result may defer according to spacing layout of led lights and position from wall. For general lighting purposes you ll want to provide 1 5 watts of lighting per square foot of space in the room. Obviously this calculator does not cover all of the possible room shapes or all of the.

If you re unsure of how many lights the room needs there s a calculator on this page that will help. Distance between recessed lights in the horizontal rows 10 3 3 33 feet. Determine room square footage. To use the formula you need the square footage of the room the lumens per fixture the co efficient of usage and finally the light loss.

To figure out how many lights you need to achieve this level of lighting you must complete an equation for lumens. Industrial spaces often require more lumens per square foot because of the complicated potentially dangerous nature of work being performed. So to get the number of lights you ll need in the room first measure to get the room s square footage. Once you know how many lights are needed you can decide on a layout and calculate their placement.

The required total wattage will be 150 2 300 watts 2 is the average wattage per foot square if you plan to use 60 watt traditional bulbs you will need five 60 watt bulbs let calculate the exact placement locations. Just select the layout enter the room s dimensions and hit calculate. Determining how many recessed lights a room needs is one of the first steps when planning the lighting for a room. Multiply by that 1 5 to get the number of watts needed for that space.

The industry standard for general lighting in a room is 70 foot candles per square foot. Multiply the length times the width of the room to get the room square footage. For instance an 8 foot wall would require lights to be mounted 2 feet out from the wall.