Perception of light - a twist in the Bhaya Bherava sutta?

In the Bhaya Bherava Sutta MN 4 translated by Bhikkhu Tannissaro this is stated as said by the Buddha. "There are some brahmans & contemplatives, brahman, who have the perception of 'day' when it is night, and of 'night' when it is day. This, I tell you, is their being in a dwelling of delusion. As for me, I have the perception of 'day' when it is day, and of 'night' when it is night..." However in the Capala Sutta A 7.58 and several other suttas the Buddha encourages meditators to develop the perception of light so that one "dwells by night as by day, and by day as by night." How are we to reconcile these two statements?