I mean where the strength becomes very high on the walls near the sourceThis is a super bizarre question. "How do I light this [specific size] corridor"....
The answer is literally just... light it? There's really no right or wrong way as long as it reads well and doesn't hurt players' eyes.
I don't know what you mean when you say "lighting issues" either.
Lower the brightness or play with the light attenuation.I mean where the strength becomes very high on the walls near the source