How do you calculate foot-candles for a room?
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How do you calculate foot-candles for a room?
To determine the needed lumens, you will need to multiply your room square footage by your room foot-candle requirement. For example, a 100 square foot living room, which needs 10-20 foot-candles, will need 1,000-2,000 lumens. A 100 square foot dining room, which needs 30-40 foot-candles, will need 3,000-4,000 lumens.
How are luminaires calculated?
How do I calculate the lighting for a room?
- Measure the dimensions of the surface of interest.
- Compute the area of the surface.
- Calculate the lumens required using the formula. lumens = lux × area.
How do you calculate lighting for an area?
To estimate the number of lumens your space will need, just multiply the square footage of your room by the number of foot-candles required for the space. For example, for a bathroom that is 64 square feet with a foot-candles range of 70-80, you’ll need from 70×64 to 80×64 lumens, or 4480 – 5120 lumens.
How do you calculate commercial lighting?
Multiply the shop’s square footage by the suggested foot-candle requirement and then divide that number by the fixture’s lumen output. This gives you the total number of fixtures that are ideal for your space. The formula would look like this: 3,200 x 50 = 160,000; 160,000/39,000 = 4.1.
What is foot-candle formula?
Footcandles (fc) = Total Lumens (lm) ÷ Area in Square Feet. 1 Lux (lx) = 1 Footcandle (fc) x 10.76. Lux = Total Lumens ÷ Area in Square Meters.
How many lumens is a foot candle?
10.76 lumens
One foot-candle equals 10.76 lumens (a lumen is considered the same as lux, which is what most modern light meters calculate their measurements in), so in order to convert your foot-candles to lumens, you will need to take the amount of foot-candles measured and multiply by 10.76 to get the number of lumens.
How many foot candles do I need?
Public areas surrounded by dark areas will generally require 2 to 5 foot-candles, or 20 to 50 lux, while typical offices and classrooms without highly detailed work will need 10 to 20 foot-candles, or 200 lux.
How do you calculate lighting per square foot?
Multiply your room square footage by the footcandle requirement. For example, a 100-square foot living room, which needs 20 footcandles, will need 2,000 lumens. A 100-square foot dining room, which needs 40 footcandles, will need 4,000 lumens 2 (see PDF and complete footcandle index).
How many foot candles are needed in a warehouse?
For warehouses and similar indoor spaces, this standard requires illumination of at least 5 foot-candles. In mechanical shops, electrical equipment rooms, and other indoor spaces that host exacting manual work, OSHA mandates a light intensity of 10 foot-candles.
How do you calculate foot-candles from watts?
Calculation Cheat Sheet:
- To calculate Lumens (Lux) from foot-candles: Lumens = Foot Candles x 10.76.
- To calculate Watts from foot-candles: Watts = Lumens x 0.001496.
- You can also calculate the number of watts directly from foot-candles by combining both equations & using the following: Watts = Foot Candles x 0.01609696.
What is 50ft candle?
For example, 50 foot-candles would be 50 x 10.76 = 538 lumens.
How many footcandles do I need for a living room?
Lighting requirements vary depending on the type of room being lit. For example, a bathroom or kitchen will require more footcandles than a living room or bedroom….The first Lighting Industry CEO: Thomas Edison.
| Room | Footcandles Needed |
|---|---|
| Living Room | 10-20 |
| Kitchen General | 30-40 |
| Kitchen Stove | 70-80 |
| Kitchen Sink | 70-80 |
How many watts is a foot-candle?
Foot-candle to Watt/sq. Cm (at 555 Nm) Conversion Table
| Foot-candle [ft*c, Fc] | Watt/sq. Cm (at 555 Nm) |
|---|---|
| 1 ft*c, fc | 1.5759751708199E-6 watt/sq. cm (at 555 nm) |
| 2 ft*c, fc | 3.1519503416398E-6 watt/sq. cm (at 555 nm) |
| 3 ft*c, fc | 4.7279255124597E-6 watt/sq. cm (at 555 nm) |
| 5 ft*c, fc | 7.8798758540995E-6 watt/sq. cm (at 555 nm) |
How do you calculate lighting for a warehouse?
Use 100 watts High Bay lights and space them out every 8-14 feet (8 for high brightness, 14 for adequate). A 6×3 pattern for example is 18 lights for basic lighting, or go 7×3 (or 6×4/8×3 depending on wiring) for 21-24 lights to get a medium brightness level. 8×4 for 32 would be very high brightness.
What is one foot-candle?
A foot-candle (or foot-candle, fc, lm/ft2, or ft-c) is a measurement of light intensity. One foot-candle is defined as enough light to saturate a one-foot square with one lumen of light.
