an 18650 powered solar light/lantern

Is there such a thing? I want an outside light for my goats and chickens that is powered by an 18650. Most seem to have a 14500

Haven’t seen both solar cells and 18650 in single lantern but this combo might interest you if you want to have both features out of the box:

It has 2 USB ports so you could connect directly two of these:

or basically any other USB rechargeable lantern. How much power you will get from solar cells depends on local conditions so it’s really down to how much light you need and how much are you willing to spend.