Don't know how much light this will provide, but the JG props were originally done by Jim Gale, of Los Angles, CA, back in the mid-60s to early 70s. Jim was a very active model boater in the LA area. Dumas Products later picked up the JG prop line. That old aluminum prop that came with K&B 3.5 OBs years ago was a JG casting.
"Old" JD