In order to guarantee the high quality of our dive light, every SCALEO infinity is subject to several tests during the production process. This blog entry will give a short overview about how those tests are performed and what they look like. The first part is going to show how we measure the light output. The second part is going to look at the mechanical resilience.
Dive light brightness test
The SCALEO infinity is one of the brightest dive lights available on the market. How do we test the brightness and what kind of information results out of the tests?
The Lux value
The easiest test to compare two dive lights is the Lux test. It can be easily performed with a Lux meter which is less than 100 €. A Lux meter measures the illumination intensity of the dive light. The resulting value indicates how bright a surface with a distance of 1 meter to the light source is being illuminated. In case you don’t know yet what Lux and Lumen are, you might want to take a look at our [blog entry] about that topic. The Lux value is of special importance when it comes to the primary light, because its light still needs to be well perceived, even when diving in waters with poor visibility. A high Lux value becomes even more important when diving with rest light in shallow waters since the beam needs to distinguish itself from the sunlight.
The difference between primary dive light, backup light and a video light is explained in our previous blog entry [Dive light guide – spot or video light].
The Lumen value
In order to find out whether we really developed the brightest dive light, further testing needs to be done. Aside from the Lux value, the Lumen value is of great interest as well. To obtain this value however, more equipment is necessary and the measuring device that we need is the so-called integrating sphere. Theoretically, the structure is relatively simple: a hollow sphere is coated in white on the inside and a Lux meter is mounted on one of the openings of the sphere, and the light source that one wants to measure on the other. Things are getting more complicated in practice though, since the coating for example is not any ordinary paint from the hardware store, the Lux meter is more expensive than the version used in the previous test and inside the sphere, you may find apertures which prevent the light from directly reaching the measuring device.
The following pictures show the SCALEO infinity undertaking the Lumen test. Its video light has more than 6000 Lumen, and the spot has 1100 Lumen.
Spectrum and CRI value
In order to measure the spectrum of a light source, a spectrometer is necessary. Inside a spectrometer, the light is split into its various components, just like in a prism. The intensity of the respective color nuance is measured via detector chips and is further used to calculate the spectrum. An example for such spectrum can be found in our blog entry [color temperature of dive lights]. But what is the meaning of CRI? The CRI value can be calculated out of the spectrum and describes, how accurately the colors which are illuminated by a light source, are portrayed. Even though the light of an LED lamp appears to be white, the wave lengths of the red color range are often missing. That’s why shades of red, found for example in the skin color, are often portrayed too dark. Higher quality LED’s, like the one we use, have a CRI value of nearly 100, which is closer to the natural sunlight. It can be seen that when it comes to video lights, a high quality of the LED’s and a high CRI value are of great importance.