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
10:30 Lumen tube
Lumen tube origins. http://www.candlepowerforums.com/vb/s...
This device in use can be found here.
If you have an idea or request for a flashlight related instructable please post it in the comments.
Thanks for watching :)