How bright is the sun in foot candles?
Full, unobstructed sunlight has an intensity of approximately 10,000 fc. An overcast day will produce an intensity of around 100 fc. The intensity of light near a window can range from 100 to 5,000 fc, depending on the orientation of the window, time of year and latitude.
How do you find the light intensity of a foot-candle?
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 many lumens is 100 square feet?
1,000-2,000 lumens
Determine the needed lumens 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.
Are foot-candles and lumens the same?
A foot-candle equals one lumen per square foot. This is a British measurement. 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.
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 many foot candles are in a 100 watt bulb?
Their efficiency is in the range of 4 lumens per watt. This means that a 100 watt bulb will generate 400 lumens – TOTAL. (Here’s the big leap) Now, if we COULD reflect all of that 400 lumens onto 1 square foot we would get a light intensity of 400 foot candles.
How many foot-candles are in a 100 watt bulb?
How many watts is 1000 foot candles?
Foot-candle to Watt/sq. Cm (at 555 Nm) Conversion Table
| Foot-candle [ft*c, Fc] | Watt/sq. Cm (at 555 Nm) |
|---|---|
| 20 ft*c, fc | 3.15195E-5 watt/sq. cm (at 555 nm) |
| 50 ft*c, fc | 7.87988E-5 watt/sq. cm (at 555 nm) |
| 100 ft*c, fc | 0.0001575975 watt/sq. cm (at 555 nm) |
| 1000 ft*c, fc | 0.0015759752 watt/sq. cm (at 555 nm) |
How many foot candles is a 100 watt bulb?
What is foot candles and lumens?
Foot-Candles – A measurement of light intensity, describes the amount of light reaching a specified surface area. Measured in lumens per square foot. Lumens per watt – refers to the energy efficacy (not efficiency) of lighting: how much visible light you get for a given amount of wattage consumption.
How many Lux is a 100 watt light bulb?
about 1600 lumens
The current 100-watt incandescent bulb is the equivalent of about 1600 lumens.
How much Ppfd do Monstera need?
100 250
PPFD Levels for Ornamentals and Others
| Genus | PPFD Lower Range (μmol/s/m²) | PPFD Upper Range (μmol/s/m²) |
|---|---|---|
| Monstera | 100 | 250 |
| Anthurium | 100 | 250 |
| Alocasia | 100 | 250 |
| Vegetables (tomato, pepper)* | 200 | 600+ |
How does light intensity change with distance?
There is an inverse relationship between distance and light intensity – as the distance increases, light intensity decreases. This is because as the distance away from a light source increases, photons of light become spread over a wider area.