The idea came from posts in https://discuss.pixls.us/t/any-interest-in-a-film-negative-feature-in-rt/12569/135. The LEDs I use are Philips Luxeon Rebels red, green, and royal-blue. They have half power bandwidth of 20 nm (30 nm for green) and peak wavelengths of 627 nm, 530 nm, and 447.5 nm.
The photos are not professional, but I do have some professional deformations…