Glow bug?

Glow bug?

Observation - Glow bug?. Description: We spotted this bug by its incredibly bright green light. We thought at first it was a child's glow stick - the photo is not good but hopefully enough for someone to tell us what this was. It looked like a large grub with a hard outer shell. It is about 1

We spotted this bug by its incredibly bright green light. We thought at first it was a child's glow stick - the photo is not good but hopefully enough for someone to tell us what this was. It looked like a large grub with a hard outer shell. It is about 1 inch long