Guidelines

How many foot candles equal a lumen?

How many foot candles equal a lumen?

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.

How many lumens of light do I need per square foot?

As a handy rule of thumb, a sitting room or bedroom will generally require around 10-20 lumens per square foot, while a bathroom or kitchen will need a stronger level of lighting, at around 70-80 lumens per square foot. To work out the lumens you need, simply multiply the square footage of the room by this figure.

How many foot candles is 2000 lumens?

20 footcandles
Lumens calculation summary For example, a 100-square foot living room, which needs 20 footcandles, will need 2,000 lumens.

Are lumens and footcandles the same?

One lumen per square foot equals one footcandle, while one lumen per square meter equals one lux. Both of these units measure an area’s illuminance, just as both miles and kilometers measure distance.

How many foot-candles is direct sunlight?

Full daylight typically equals about 1,000 foot-candles, while an overcast day would have only 100 foot-candles of light. Twilight produces just 1 foot-candle, while a night with a full moon has 0.01 foot-candle and an overcast night has only 0.00001 foot-candle.

How many watts of light do I need per square foot?

An average LED lighting system draws about 32 watts to serve 1 square foot of grow space. The wattage in a grow room could be amplified up to a maximum of 50 watts per square foot. Going beyond that amount would create a too strong indoor plant light intensity, which could stunt the growth of your plants.

How many lumens do you need per square foot in a shop?

A general rule of thumb is to use 130 to 150 lumens per square foot of work space. For example, a 40-watt fluorescent bulb puts out about 2,200 lumens. A 60-watt incandescent bulb puts out about 800 lumens.

How many foot-candles do my plants need?

Plants referred to as low light intensity plants generally should receive between 50 and 250 foot-candles. Under artificial light, a few plants in this group can be maintained at as little as 10 foot-candles. Low-light plants should receive between 10 and 15 watts of fluorescent light per square foot of growing space.

How many lumens is a cloudy day?

A rough estimate at mid day on a typical cloudy day would probably be somewhere between about 5,000 and 15,000 lux.

How do you calculate watts per square foot?

Divide the wattage consumed in the room by its area in square feet to calculate watts per square foot. In our example, 650 watts divided by 192.89 square feet is 3.37 watts per square feet.

How many lumens do I need for a 1200 square foot garage?

A general rule of thumb is to use 130 to 150 lumens per square foot of work space.

How many foot candles is direct sunlight?

How do you convert lumens to foot candles?

– Understand the meaning of lumens and candlepower Candlepower, also known as candela, is the fundamental unit of photometry. – Start with the amount of candlepower Determine the total amount of candlepower you wish to convert. That is the starting figure. – Multiply by 12.57 Multiply the starting figure by 12.57.

How many footcandles equal a lumen?

How many foot candles are in a lumen? 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 lumens are in a foot candle?

Please note that one foot-candle = 10.76 Lumens*, which means that in order to convert foot-candles to lumens, I would need to take the amount of foot-candles that I measured, 50 foot-candles ,and multiply by 10.76 to get the number of lumens (50 x 10.76 = 538 lumens)

How many lumens is 30 foot candles?

Using the metric system, a lumen is measured by a square meter or a lux. Thus a foot-candle is equivalent to approximately 10 lux or 10.57 lux. A higher number of lumens are indicative of a brighter, more intense light, whereas a lower number of lumens represent dimmer, more subdued lighting.