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Come Into the Olight Laboratory - Part One

Come Into the Olight Laboratory - Part One

30 Jun, 2022

Olight has always had high demands on the quality and performance of its torches. We always uphold a professional and rigorous attitude to make good products of high quality. This is the reason why we have the courage to promise our customers a 5-year warranty!


Olight torches undergo a series of tests in a simulated harsh working environment before leaving the factory, so that the hidden problems in the product development and production process are exposed in advance, fully guaranteeing that the product sold to customers can withstand the tedious trial and test of time.


Today, I would like to take you into the Olight laboratory to see how a good torch passes the test.

Measurement/Testing During the R&D Phase

During the R&D stage, we conduct a series of technical parameter measurements and reliability experimental tests on torches, and we screen out samples that do not meet the qualified standards and analyse them. Through improvement and refinement again and again, only products that have successfully passed the tests can enter mass production.


1. Measurement of important parameters


(1) Measurement of Luminous flux


When buying a torch, people are often most concerned about the luminous flux of the torch, so how are the parameters related to luminous flux and colour temperature measured?


Luminous flux is the amount of light emitted by a light source per unit of time and describes the total amount of light emitted by the light source. In layman's terms, if a light bulb is placed inside a closed sphere and then lit, the overall amount of light energy received by the inner surface of the sphere is the luminous flux of the bulb.

Left: High-precision fast spectroradiometer;    Right: Integrating sphere

This machine shown above is used to measure luminous flux, using the 4π test method. The overall flux of the torch is measured by placing the torch inside the integrating sphere.

Once the test is complete, the parameters of the luminous flux and colour temperature of the torch are output to the computer, isn't that very smart? The data obtained in this way is also very realistic and objective.

(2) Measurement of Luminous intensity


luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle. The symbol for it is I, in candela (cd). When the light source radiation is uniform, I = F/Ω, Ω for the stereo angle, the unit is the spherical degree (sr); F for the luminous flux, the unit is lumens (lm).


Apart from the conversion method, how can the luminous intensity of a torch be accurately measured? Take a look at the "dark room" in Olight laboratory. This is an all-black, opaque space with a light sensor, which provides a multi-point, all-round light intensity measurement for the torch and gives more accurate data.

(3) Runtime test

How to know the lumen change of a torch during use? The runtime marked on the torch is the time it takes from when the torch starts working to when it runs to 10% of its initial brightness, also called the effective runtime.


To know the exact runtime, you need to test it with a runtime testing box.

Put the torch upside down on the box, and through the data recorded by the illuminometer, you can calculate the illumination change of the torch from on to off and the runtime of it.

2. Environmental tests

(1) Temperature rise test

As you know, a torch that heats up too much will make you feel hot and a bad experience to use, or even cause lumens depreciation or damage. That's why Olight torches are tested for temperature rise during the development phase, and the maximum temperature rise is strictly controlled to below 55 degrees. Those do not meet the standard will be improved and perfected again.


This test is carried out using an instrument called multichannel data loggers. Under warm conditions (25°C), turn on the torch sample, switch to the highest brightness and record the maximum temperature value.

(2) High/Low temperature test


Not only that, but the torch has to go through high/low temperature environmental tests. This is where our temperature and humidity test chamber come in handy.

Don't underestimate this box, although it looks like a small refrigerator, it can reach high temperatures up to 150 degrees and low temperatures down to -70 degrees. Damp heat tests are also carried out inside.

High/Low temperature test conditions
Low temperature storage: -40°C, 16h
Low temperature operation: -20°C, 6h or automatic shutdown when sample power is low
High temperature ageing: 55°C, 72h
High temperature running: 55°C, 8h


 (3) Rapid Temperature Change Test


Here comes the "cruel" test! Can the torch stand up to rapid temperature change and alternating hot and cold conditions? The test conditions for rapid temperature change are: high temperature set at 75°C, low temperature at -40°C, running time set at 0.5 hours and cycling 5 times.


Well, this article will stop here first. The explanation of "Olight's Lab" will be divided into 2 articles.
If you are interested, please click to view "Olight's Lab 2

How to Choose the Best Camping Torch?
Come Into the Olight Laboratory - Part Two