You can also charge the vest with indoor light, but it will not glow-in-the-dark as long as sunlight charging.
. Hi-Vis Econ TpR/Cl2 Glow Vest /2Tn Trm-Org-3X Custom imprinting available for the left or right chest and back center. Charging the vest for 30 minutes in sunlight will allow the vest to glow-in-the-dark for approximately 8 hours.The Radians SV22GL-2 Economy Type R Class 2 Safety Glow-In-The-Dark Vest with two-tone trim is perfect for mine workers, construction work that extends past sundown, parking lots, shipyards, cruise ships, or anywhere that there will be limited light needed for reflective tape.