I've a project in which I want to add 10-12 led lights around webcam's lens so that the camera can detect retro-reflective tape in it's viewing area.

How this process works is something like this. I'll power on the red led lights while taking pictures of a human model. The red light of leds will make the captured frames' tapes put on human model light up very brightly(reflection of tapes will be at the same path of led light's emission-because the tape is retro-reflective) so I can separate the tape from other objects in the scene and find its 3d coordinate using c++ programming and image processing software.

I need advice in buying the led lights from http://www.digikey.com. Because I need very bright red led lights and also efficient(low voltage like 1.5 - 2volt and low amperage) what should I look for in the spec? Do I need to change the color of led lights(the tape reflects 50x more than normal white diffused surface)?

What is Millicandela rate?

How this rating help choosing the brightest led light?

The camera's vertical angle of view is 52 degrees and horizontal FOV is 75 degrees. So if I need to create a technically professional looking mocap camera what type of led lights do I need for this project?

If I capture the 2d images in a brightly lit room will the led lights and my process(explained above) work with the camera? What wavelength of led light is important for this project? Should I broaden my spec for voltage and amperage?

Any other advice is welcome.