General Facts +
Color Temperature & CRI +
Color Temperature
CRI
Color Comparisons
Application Guide
Measuring Bulbs
Bulb Types
Base Types +
Incandescent
Halogen
Fluorescent
Compact Fluorescent
HID
Glossary
Specific Facts +
Incandescent +
Basic Information
Filaments
Diagram
Bulb Types
Bases
Halogen +
Halogen Cycle
Halogen Diagram
Halogen vs Standard
Bulb Types
Bases
High Intensity Discharge +
Basic Information
HID Diagram
Bulb Types
Bases
Linear Fluorescent +
Basic Information
Fluorescent Diagram
Phosphor Diagram
Bulb Types
Bases
Compact Fluorescent +
Basic Information
Fluorescent Diagram
Phosphor Diagram
Bulb Types
Bases
Light Emitting Diode
Ballasts +
Basic Information
Wiring Diagrams
Ballast Types
Bases
See the Products +
Incandescent Bulbs
Halogen Lamps
LED Lamps
Compact Fluorescent
Fluorescent Tubes
High Intensity Discharge
Ballasts
Xelogen
Light Fixtures
High Intensity Discharge Bulb Types
A bulb designation consists of a letter(s) to indicate the shape and a number to indicate the approximate major diameter in eighths of an inch. Click on an image below to view a sample product for each bulb style.
ED-17
E-17
ET-18
ET-23.5
E-25
BT-28
BT-37
BT-56
PAR
T-7
T-15
Single Ended
HQI Compact
Metal Halide
70W and 150W
Mogul Base HQI
Metal Halide
250W and 400W
Double Ended HQI
Compact Metal Halide
70W and 150W
Double Ended HQI
Compact Metal Halide
250W