Common Lamp Values for Photometric Lights
 
 
 

The tables in this topic list some commonly used lamps values that you can use as a guide for defining photometric lights.

The information in the tables is approximate; however, you can refer to manufacturer’s documentation for more precise photometric data for these lamps.

General-Purpose Lamps

NoteIn the tables below, “Class.” stands for “Classification”; the values under “Intensity” are expressed in candelas.

Class. Watts Type Intensity Beam Field
A-19/ Med 60 Point 70    
A-19/ Med 75 Point 95    
A-19/ Med 100 Point 139    

M16 Low Voltage Lamps

Class. Watts Type Intensity Beam Field
Narrow Beam 20 Spot 3300 6 12
Narrow Beam 50 Spot 9150 12 25
Medium Beam 50 Spot 3000 25 50
Wide Beam 20 Spot 460 38 75
Wide Beam 50 Spot 1500 38 75

Par36 Low Voltage Lamps

Class. Watts Type Intensity Beam Field
Narrow Beam 25 Spot 4200 9 15
Narrow Beam 50 Spot 8900 10 15
Medium Beam 50 Spot 1300 30 60
Wide Beam 25 Spot 250 36 75
Wide Beam 50 Spot 600 39 75

Par56 Line Voltage Lamps

Class. Watts Type Intensity Beam Field
Narrow Beam 300 Spot 68000 9 15
Narrow Beam 500 Spot 95000 9 15
Medium Beam 300 Spot 24000 18 36
Medium Beam 500 Spot 47500 18 36
Wide Beam 300 Spot 10000 30 60
Wide Beam 500 Spot 18000 30 60

Par38 Line Voltage Lamps

Class. Watts Type Intensity Beam Field
Narrow Beam 45 Spot 4700 14 28
Narrow Beam 75 Spot 5200 12 25
Narrow Beam 150 Spot 10500 14 28
Medium Beam 45 Spot 1700 28 60
Medium Beam 75 Spot 1860 30 60
Medium Beam 150 Spot 4000 30 60

R40 Line Voltage Lamps

Class. Watts Type Intensity Beam Field
Narrow Beam 150 Spot 5400 22 50
Wide Beam 150 Spot 1040 76 130
Wide Beam 300 Spot 1950 76 130