But I practice all year round The hard part is judjing your whole 3 dimensional change that happens about us. Remember when you were a kid, and had "senses" that were keen; and you could run by the light of the moon, as if it were the glory of the sunshine of the next day.
But us PWP shouldn't wander around in the dark. Our balance can be very compromised, and then you fall, and fall again.
Get some of the higher wattage nite-lite bulbs, and place them at nodes of areas where you will be walking. This way, you've always got a "beacon'' of light, which I find pretty good at aligning direction, and avoiding any number of obstacles that you had no idea were there.