Zelda Tears of the Kingdom Deep Firefly
The Zelda Tears of the Kingdom Deep Firefly material is used for Grants glowing effect to whoever eats it. You can use this ingredient to make Bright Elixir and many other recipes.
Effect: 
Glow
GlowDescription: A multi-winged insect that lives in the Depths. It excretes luminescent elements that can be cooked into an elixir, which will add a faint glow to anyone who consumes it.
Where To Find and How To Get Deep Firefly
The Deep Firefly is most commonly found in the following locations: Great Abandoned Central Mine , Lanayru Wetlands Depths.