The types of plants that can emit light.

There are some plants that exhibit a faint glow, especially when stimulated in low light conditions. Some naturally bioluminescent plants include:

1. Devil’s Backbone (Pedilanthus tithymaloides): The leaves of this plant may emit a faint glow in darkness, producing a subtle luminescence.
2. Penis Cactus (Trichocereus/Echinopsis): Certain types of cacti like Echinopsis ancistrophora might emit a slight glow at night.
3. Lantern Tree (Genus Crinum): Some species within the Crinum family may emit a faint glow in low-light conditions.
4. Moonflower (Ipomoea alba): These plants produce large white flowers that may glow in the dark.
5. White Torch Cactus (Cleistocactus strausii): A type of cactus that could emit a faint glow in low light conditions.

However, this phenomenon is typically very subtle and not comparable to electric light. The natural bioluminescence of these plants is often only noticeable in very dark conditions.