I recently renovated my kitchen and grossly underestimated the amount of light I would want / need. I only have two recessed lights in my relatatively small rectangular kitchen of roughly 5 1/2 feet by 10 ft. The current lights are centered in a line 4 ft. apart. See crude image. They are 65w BR 30 bulbs.

My question is, if I want to add three more lights to the space, what is the minimum distance I can have between them? If I put one in between the current ones, they would be 2 ft. apart. If I put all 3 in between in a triangular spacing, they would be even closer together. Is that ok?