Every bulb is coded with a letter to help you identify the shape. Refer to the guide below for all standard bulb shapes and their corresponding letters.
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| Bulb Name | Arbitrary Designation |
Twist | Blunt Tip | Reflector | Bulged Tube |
| Symbol | A | B | BR/R | BT | |
| Common Fixtures | Table Lamps | Table Lamps | Chandeliers and decorative fixtures |
Recessed cans and track lights |
Table lamps |
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| Bulb Name | Candle | Circline | G8 120V | Globe | Mirrored Reflector |
| Symbol | CA | CIR | G8 | G | MR |
| Common Fixtures | Chandeliers and decorative fixtures |
Table Lamps | Specialty | Vanity strips and pendant lights |
Track light |
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| Bulb Name | Parabolic Aluminized Reflector |
Reflector | T4 12V | Tubular | |
| Symbol | PAR | R/K | T4 | T | |
| Common Fixtures | Security fixtures, recessed cans and track lights |
Recessed cans and track lights |
Speciality | Appliances and Pictures |