Many different factors to consider when choosing a luminaire

- Mar 09, 2020-

There are many different factors to consider when choosing a luminaire for use in a hazardous area.The lumen output (or power) of a luminaire is an important consideration.But are all lumens' output data comparable?In this article, we will explore the difference between "source lumens" and "delivered lumens."

Illuminant lumen: the "illuminant lumen" value is the amount of light emitted at the source of the lamp before it passes through any lens or diffuser.Lumens disappear with each reflection, refraction, or absorption of each material through which light passes, resulting in the value of the "transmitted lumens" being less than the specified emission value.Since the mechanical structure of the lamp interrupts the flow of light, especially at the end of the beam Angle, the output can also be blocked or dispersed.

Transmission lumen: "transmission lumen" is the most accurate measure of the performance of the lamp after installation.It is the actual amount of light delivered to the site, taking into account all the obstacles such as lenses, housing, and any filtering effects.

Now we know that lumens can be measured in two different ways and will produce two very different shapes.Now we will examine its effects in more detail.