A refrigerator appliance includes drawer assembly for a chilled chamber of the appliance. The drawer assembly includes a storage bin positioned within the chilled chamber and one or more adjustable dividers slidably mounted within the storage bin. The adjustable dividers include a top support arm, a window that acts as a light guide or diffuser, and a light source mounted to the adjustable divider for illuminating the storage bin. The drawer assembly further includes a power supply, such as a bus bar assembly having parallel positive and negative strip terminals that remain connected with spring terminals on the adjustable dividers to ensure the light source remains illuminated when the adjustable dividers are moved within the storage bin.