Things You'll Need
Instructions
Cover the light end of your flashlight with highlighter tape in your desired color. If you do not have highlighter tape, you can use colored saran wrap or even no color filter at all.
Fit the piece of clear PVC pipe around the light end of your flashlight. Make sure it fits tightly around your flashlight. If it is somewhat loose, wrap it with duct tape to secure into place. If you do not have a piece of clear PVC pipe, you can use transparent tape to attach a clear transparency sheet around your flashlight's face. To do this, simply wrap the transparency around the light by forming it into a cylinder and taping it in place.
Paint or color your lightsaber as desired.