We have tons and tons and tons of glow sticks. They’re an easy, quick, lightweight light source that requires no batteries. Sure, once you’ve cracked them open and they’ve stopped glowing, then they’re basically trash. But glow sticks are a great way to have consistent, small amount of light.
You can get glow sticks at the dollar store and on sale at Walmart after holidays. You can regularly find them in the party isle of most stores.