A lighting device includes a handheld unit, a light bulb, and an accessory unit. The handheld unit defines a battery compartment, and includes a screw hole formed in one end of the handheld unit. The light bulb engages threadedly the screw hole. The accessory unit includes a positioning member attached to the end of the handheld unit, an arm extending outwardly from the positioning member and inclining with respect to an axis of the screw hole, and an accessory member connected to the arm and offset from the light bulb. The handheld unit further includes an external screw thread formed on an outer surface of the one end of the handheld unit. The positioning member includes a ring member engaged threadedly to the external screw thread and connected to the arm.
