DIY Lumen Measuring Device. Integrating Shpere, and Lumen Tube.

How to build your own light measuring device. Test flashlights, LEDs
and more. In this tutorial I teach you how to build an integrating sphere and a lesser know device called a lumen tube, all at a budget price.

1:45 Integrating sphere

5:05 Calibration

10:30 Lumen tube

Lumen tube origins. http://www.candlepowerforums.com/vb/s...

http://budgetlightforum.com/node/8054

This device in use can be found here.

https://www.youtube.com/watch?v=XIywzCfvunY

If you have an idea or request for a flashlight related instructable please post it in the comments.

Thanks for watching :)