55 Luminaire Lumens Per Circuit Watt

Watts to lumens calculator lumens to watts calculation formula.

55 luminaire lumens per circuit watt.

The power p in watts w is equal to the luminous flux φ v in lumens lm divided by the luminous efficacy η in lumens per watt lm w. A 40w equivalent ge spiral cfl light bulb uses 10 watts of electricity to put out 580 lumens so the energy efficiency of that light bulb is 58 lumens per watt. Maximum wattage permitable comes down to 100w from 150w with. Every light bulb produces a certain number of lumens per watt and the ratio of lumens to watts is the bulb s luminous efficiency.

The luminous flux φ v in lumens lm is equal to the power p in watts w times the luminous efficacy η in lumens per watt lm w. Lumens to watts calculator watts to lumens calculation. It is the ratio of luminous flux to power measured in lumens per watt in the international system of units si. Leds are most efficient.

You can compare bulbs by checking their efficiencies on a watts to lumens chart. Lumens are units of brightness and watts are units of energy. Depending on context the power can be either the radiant flux of the source s output or it can be the total power electric power chemical energy or others consumed by the source. The average initial efficiancy should be no less than 55 luminaire lumens per circuit watt for installations in existing and new buildings.

φ v lm p w η lm w watts to lumens calculation. So i need to know the levels of luxs that are required for vets and then find a lamp like t8 fluorescent tubes the have a lef of around 85 lumens and. The problem is to achieve this 85 lumens per circuit watt i could just install one light in each room that has a lef of 85 lumens this how ever wont light the installation enough for it purpose. The efficacy target looks like increasing to greater than 45 lumens circuit watt from 40 ie no gls or tungsten halogen lamps.

By area or number. That s more than 4 5 times as efficient as the ge incandescent light bulb. Energy saving lamps have high luminous efficacy more lumens per watt. Luminous efficacy is a measure of how well a light source produces visible light.

When calculating the average luminaire lumens per circuit watt the circuit watts for each luminaire may first be multiplied by the control factors in the table below.