#1 surface Lightstream reflector in the 50x50cm size. #1 Lightstream reflectors redirect the source beam without changing the spread. The #1 reflectors act much like a front-facing mirror but with more homogenous reflection result when using dedolight sources with Parallel Beam Intensifiers. Results from lights without narrow spot beams vary unpredictably. For controlled, systematic and maximum results, use a dedolight with Parallel Beam Intensifier (intense spot). All Lightstream reflector boards transfer over 95% of source light. The back side of the reflector uses a sliding rail for use with it's sliding mount, the DLR-LOCK, or DLR-MLOCK (motorized mount). All Lightstream reflector boards transfer over 95% of source light.