What is the difference between candlepower and candela

Are candlepower just some made up Chinee unit or some Biblical unit? But then I see the spotlight at the top of the Vegas Luxor to be 40 billion candlepower. HERE have a read.

Plus on the other forum I found an answer…they say the candlepower are 30 times 30x exaggerated. Nowadays candela and candlepower can be considered as being equivalent. Historically there was a minimal deviation. The candela has become the official unit. And in a certain distance this luminous intensity then results in a certain illuminance, measured in lux the further away, the less lux. Foot-candles and lux measure the same thing—the amount of visible light that falls on a surface.

The difference is that the foot-candle uses the Imperial standard measuring system feet, pounds, etc. A single foot-candle is equivalent to the amount of light that falls on a surface that is one foot away from a single candle, and a lux is the amount of light that falls on a surface one meter away from a candle. Find the ideal LED lighting solution for your vehicle.

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Order number. Product Category. If the radius of that sphere is a distance of one foot, a foot-candle is the amount of light that falls on the inside surface of that sphere. For the lux, take that same example and simply change the radius of the sphere to a distance of one meter — the amount of light falling on the inside surface of the sphere would be one lux. See the illustration below for a visual depiction of these measurements and how they relate to one another.

If you ever need to convert between foot-candles and lux, the rule of thumb is that one foot-candle is approximately equal to