Quick search resulted in this from w--.benboardman.c-m
"NEW! Make sure you read the article on
De Vere Digital BLACK and WHITE
Output costs:
Photo paper is accepted as the lowest cost, best and correct media for outputting digital files from any source.
Print size:
The 504 DS creates a "virtual" negative that can be projected, sized and exposed and processed in the normal way, printing all sizes up to 20 x 24 inches (50 x 60 cms). The degree of enlargement available depends on the input file and the desired result".
Sad really, isn't it...?
I don't know of any other LED light source meant for "actual" negatives other than the Zone VI, but there may be others out there?
Murray