Like its better known cousin, Lower Antelope Canyon also has light beams in a certain section of the canyon. In the spring the sun shines through this slot at about 10:30 am and lasts for 15-20 minutes. The Navajo guides throw copious amounts of sand into the beams to highlight them for the photographers, and the entire hall is filled with dust. I had to keep blowing my lens to get rid of the fine coating of dust that settles every few minutes. After you shoot the slot canyons in Arizona, your lens will never be the same again.