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How Much Area Does a Flood Light Cover?

Tony Black |

Let us start with a definition for “flood light”, a flood light is a high lumens or wattage source of light which is able to “flood” a wide area with brightness. Floodlights are generally used on commercial and public buildings to light up large areas providing additional access and security.

Nowadays the best flood lights are LED Flood Lights. LED Flood Lights are better suited for outdoors compared to older traditional lighting technologies. LED Flood Lights are more durable and sturdy, they are great to withstand harsh weather conditions, especially if the light is well designed with excellent housing, component materials and craftsmanship.

Depending on size, wattage and installation height floodlights can cover different size areas. For example if you put a Max Series 300w flood light at 19ft high it can cover a 17 square feet area with an average of 28fc on the floor. If you put a Max Series 300w flood light at 26ft high it can cover a 17 square feet are with an average of 16fc on the floor surface.

How bright is a 100w floodlight?

It will also depend on the flood light model and their Lumens per Watt. For example a Max Series 100w flood light produces 13000 Lumens, its energy efficiency is 130LM/W. Another example a Mars Series 100w flood light can produce 12000 Lumens, its energy efficiency is 120LM/W. Another good example would be a 70w Eyes Series Flood Light produces 7700 Lumens, it has an energy efficiency ratio of 110LM/W

What is a Lumen?

Lumens are the new way of knowing how much brightness a lamp can produce, Lumen equals light output. Lumens or LM (lm) are a measure of the total amount of visible light, to the human eye, from a light source (light fixture, lamp, etc.) The higher the number of lumens the brighter the light source is.
“The lumen is the standard unit for the luminous flux of a light source. It is an SI derived unit based on the candela. It can be defined as the luminous flux emitted into unit solid angle (1 sr) by an isotropic point source having a luminous intensity of 1 candela. The unit lumen is then equal to cd x sr. The abbreviation is lm and the symbol is Φv. In terms of radiant power (also called radiant flux) it can be expressed as: Luminous flux in lumens = Radiant power (watts) x 683 lumens/watt x luminous efficacy” according to HyperPhysics, a publication from Georgia State University.

Lumens as we can read above are not the same as Watts, Watts are the energy power required per second by a light fixture in order to produce light or brightness (lumens).

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