You can use smaller 40w lightbulbs to replace the bulbs on your Greystone 26" Electric Fireplace # 324-000065. These bulbs can be obtained at any local hardware or home store. The bulbs can be accessed from the back of the unit, so you will have to take the unit out in most circumstances. I've attached a diagram from the instruction manual that show the process and where they are located. view full answer...