Is "for" redundant here?

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. LED lighting allows for greater contrast and wider colour gamut.
  2. LED lighting allows greater contrast and wider colour gamut.

Which is correct? Thanks

2

Both are possible, but I’d prefer the first.

3

Are there any places for “both”? Thanks

4

Yes, there’s just a slight difference in emphasis.