Light Bulb Shapes - vary, from pear shapes to funnel shapes to tube shapes. Each light bulb type has a designation. Examples include: PAR for parabolic aluminized reflector light bulb or T for tube. Many household halogen light bulbs are a MR16, the MR is for 'metallic reflective' light bulb.

Bulb shapes are derived from these names. Several of the more general classes of bulb types are outlined below.

• A - Standard household incandescent light bulb shape
• B - Bulged bulb shape
• BT - Bulged or Blown Tubular bulb shape
• BR - Short reflector style light bulb
• C - Candle or Conical bulb shape
• CP - Crystalline Pear bulb shape
• E - Ellipsoidal bulb shape
• ER - Extended reflector light bulb shape
• F - Flame style candelabra bulb shape
• G - Globe bulb or circular bulb
• HK - Hexagonal Candle
• K - Krypton or narrow reflector light bulb shape
• MB - Halogen bulb
• MR - Quartz reflector lamp (low wattage)
• P - Pear bulb shape
• PAR - Parabolic Aluminized Reflector (PAR) lamp
• PS - Elongated standard incandescent bulb
• R - Reflector light bulb style
• S - Strait Sided bulb style
• T - Tube lamp shape