By Chris Juden. The lumen is a significant entity: it measures the total amount of visible light emitted by a given source. One is 130 lumens per watt. When the average candle burns, how does one calculate how much heat energy it is producing per weight of wax, and what is the equivalent light output, in watts, from an electric lightbulb? I had cause to buy a 12v/ 20w bulb, but was a given a 35 candle power rated one and was advised it is the equivalent, can anyone advise. Candlepower To Lumens . This unit is considered obsolete as it was replaced by the candela in 1948, though it is still in common use. Low energy and highly efficient, this bulb will last approximately 30,000 hours dependant on daily usage. The historical candlepower is equal to 0.981 candelas. All other measurements are based on the lumen.The lumen measurement originated from the basic concept of foot-candles. Lumens give an accurate measure of perceived light output at a given distance from a light source. Also, explore many other unit converters or learn more about illumination unit conversions. Foot-Candle: ftâcd: Lumen/Square Centimeter: lm/cm² : Lumen/Square Foot: lm/ft²: Lumen/Square Meter: lm/m²: Lux: lx: Meter-Candle: mâcd: Nox: Phot: ph: Watt/Square Centimeter (at 555nm) W/cm²: Change direction: Most popular convertion pairs of illumination Meter-Candle â Foot-Candle. Suitable for most E14 fixtures. Even when you do know, it doesnât help much because they each measure different â¦ 2: Enter the value you want to convert (foot-candle). So it's not like the energy-efficient light bulbs. Illustration of the total luminous flux (lumens) emitted by an incandescent bulb. Notice the average to maximum ratio of 1.85. 12.57 lumens Candlepower and lumens measure different light qualities, and 1 candlepower equals 12.57 lumens. 0 0? alimaj. Watt/Square Centimeter (at 555nm) â Foot-Candle. In the calculator, select Watts to Lumens as the conversion type, enter the value 35 and select the item Light bulb for comparison. Lumens Quick Guide Taking a few minutes to determine the recommended lumens per square foot with the method outlined above is ideal. Check the chart for more details. A watt is a unit of power; candlepower is measured in candelas (sometimes called candles), and is a unit of luminous intensity. 12.57 lumens . Divide the number of lumens â¦ When measuring lumens, you can also think of it as the light illuminated in a 1-square-foot area one foot away from a single candle. 3 Both produce the same amount of light. Foot-candle: Watt/square centimeter: Note: Fill in one box to get results in the other box by clicking "Calculate" button. Watts, Lumens, Candles and Lux. Candlepower, also known as candela, is the fundamental unit of photometry. Free online illumination converter - converts between 12 units of illumination, including lux [lx], meter-candle [m*c], centimeter-candle [cm*c], foot-candle [ft*c, fc], etc. Convert candlepower to lumens by multiplying the amount of candlepower by 12.57. Then click the Convert Me button. The photometric shows 4 rows of 9 150 Watt LED UFO needed to achieve 30 fc with uniform light distribution. 0 0. watts W Lumens L million candlepower mcp L/W mcp/W cp/L 25 3200 25 128 1.00 7813 35 3200 15 91 0.43 4688 50 4500 15 90 0.30 3333 50 3200 25 64 0.50 7813 so your lumens per watt varies from 128 to 64, your million cp per W goes from 1 to 0.3 and your cp per lumen varies from 7800 to 3300. One was listed as 3 watt and another listed as 1 watt. LUMENS/WATT CALCULATOR. Watts to Lumens calculator It is a conversion calculator used to convert the electric power in watts (W) to the luminous flux in lumen (lm). ARETE Screens is a world class manufacturer of Projection Screens. Knowing how many lamps you need to adequately illuminate a room or space can be tricky. 4 years ago. Thatâs a difference of 42.73 watts. 1 candlepower = 0.079 lumen. Anonymous. In addition to the size of the space, a variety of factors, such as the activities being conducted and wall reflectance can also play a role. Lumens to Watts Comparison Table . To switch the unit simply find the one you want on the page and click it. Hi can anyone say if there is a conversion factor for watts to candle power. Tuesday, 9 September 2014. This is a conversion chart for foot-candle (Photography units). You didn't even give the watts or lumen rating of the bulb in the electric lantern. Lumen Estimation Calculator. Wattage to Brightness Comparison. C You can also calculate the number of watts directly from foot-candles by combining both equations & using the following: Watts = Foot Candles x â¦ Source(s): brighter 175 lumens 1000 candle power soooooo much: https://bitly.im/s5MKU. A candela is a lumen per steradian. You already know about how to convert foot-candles to lumens (Lux) and Watts: A To calculate Lumens (Lux) from foot-candles: Lumens = Foot Candles x 10.76 . Since lumens and Candela are of different quantities, they cannot be converted directly and requires the apex angle in degrees. clear candle 40w watt small edison screw candle bulb ses // e14 x 10 4.4 out of 5 stars 1,086. Watts, Lumens, Candles and Lux. Candle power and lumens are brightness measures and watts is power with conversion efficiency needed. Do a quick conversion: 1 candlepower = 0.981 lumens/steradian using the online calculator for metric conversions. How many lumens is 2 million candlepower? Foot-candle â Watt/square centimeter Conversion in Batch. A 40 watt incandescent filament bulb produces roughly 460 lumens. 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