The J type halogen bulb is a rod-shaped double-ended bulb with a voltage ranging from 12 volts to 270 volts. They come in small to medium sizes with lengths ranging from 3 inches to 16 inches. The J type halogen bulbs are commonly used to light up appliances like microwaves and ovens.

What do the letters mean on light bulbs?

Bulb Shapes and Sizes The code number of a bulb consists of a letter or letters followed by a number. The letter indicates the shape of the bulb and the number relates to the diameter of the bulb in eighths of an inch. … The bulb is “A” type and the diameter would be 23/8″. A 65BR40 is a 65 watt reflector 5″ in diameter.

What does RSC base mean?

R: Reflector. RSC: a bulb base design used in halogen work lights such as the rightmost bulb shown in the photos above. The bulb shown is a 100-Watt 120-Volt lamp used in work lights and in outdoor security lights. SB: Silver bowl, which indicates that the bottom of the lamp is opaque and reflects the light upward.