# LUX as compared to Watt

Lumens, lux, watt? It is simple to get confused about the different terminology that are used, when choosing a new flashlight or headlamp. Below you will be able to read more about 3 of the terms, Lumens, Lux and Watt.

## Lumens & light

*Luminous flux is referred to as Lumens and is a unit of (led)light*

LM (Lumens) is a way of measuring unit, which tells just what the total amount of light emitted coming from a flashlight or headlamp. It is possible to roughly state that the greater Lumens the brighter the light. Whenever we test and compare products, we make use of lumens to determine the entire quantity of led light output. But lumens is only going to show us a part of the picture. Producing and creating a perfect beam pattern does not reveal enough information to show how the light output is created. For this we have to use a lux meter. Once we measure the amount of lumens, we make use of a highly specialized light sphere from Everfine. We have one at our factory and one at our head office to ensure that each batch is perfect and delivers what we promise. Most flashlights and headlamps quickly fall in lumens and promise a higher lumens output than they can accomplish. To avoid this in products, (beauty) manufacturers carry out light-weight assessments on all of their led light products to ensure the lumens amount is absolutely correct. To acquire a constant light output, we make use of a Continuous Current Output technology within some of our products in order to get the very best feasible light output for the whole life of the battery.

## Can I use of Watt to pinpoint the power of a light?

*Watt is really a unit for energy usage*

The short answer is no, Watt demonstrates just how much power the product consumes, certainly not just how much light output (lumens) it provides. That is why you should not search for the amount of watt consumed, when shopping for an Aduro Led mask or for any kind of light. It will only inform you how fast it will drain the battery, rather than how much light it produces. It is also worth to learn that 1Watt halogen and 1 Watt LED do not produce the same amount of light. The LED Chip is much more efficient and will convert a lot more energy to light than the halogen light bulb. It is important to take into account that the more energy taken the more heat is generated, and heat will usually result in a loss of energy. Although when you are on a holiday heat gives you energy 😉 it will calm you as if you were in Hypnose Amsterdam. That is why all of our flashlights and headlamps are equipped with a solid aluminum heat sink, which uses the whole device to efficiently divert the heat throughout the core construction. This will ensure a stable high light productivity for a much longer period, and extend the life time of the LED Chip. This is much more cost-efficient.To visualize how much light a product gives, it is essential to know what the quantity of lumens corresponds to. On the chart you can see common known objects and how much light they produce calculated in lumen. Start using these common known objects as being a reference to how much light you require. Remember that a lot of manufactors promise a higher lumen output than the product actually can provide. It is a good idea to look after the Light Curve on the given product. When it is not available, we recommend you to contact and ask the manufacturer of beauty products. Or justask Brady. He knows all.

For the die hards…

## Calculate LUX to Watts yourself

*Lux to watts calculation formula*

Lux to watts calculation with area in square feet.

The power P in watts (W) is equal to the 0.09290304 times the illuminance Ev in lux (lx) times the surface area A in square feet (ft2), divided by the luminous efficacy η in lumens per watt (lm/W):

P(W) = 0.09290304 × Ev(lx) × A(ft2) / η(lm/W)

Lux to watts calculation with area in square meters

The power P in watts (W) is equal to the illuminance Ev in lux (lx) times the surface area A in square meters (m2), divided by the luminous efficacy η in lumens per watt (lm/W):

P(W) = Ev(lx) × A(m2) / η(lm/W)

Lost? So are we 😉

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