Sizing Guide

2 3 4 5 6 7 9 10
4 6 8 10 12 14 18 20
3 4 6 8 10 12 14 16
6 8 10 12 15 18 21 24
4 6 9 12 15 18 21 24
8 10 12 15 18 21 24 27
5 8 12 16 20 24 28 32
10 12 15 20 24 28 32 36
6 10 15 20 25 30 35 40
12 15 18 24 25 30 35 40
7 12 18 24 30 36 42 48
14 18 21 28 30 36 42 48
9 14 21 28 35 42 49 56
18 21 24 32 35 42 49 56
10 16 24 32 40 48 56 64
20 24 27 36 40 48 56 64
Highbay Fixture Quantity Estimator
Model (SKU # 3480121, 3482105)
The white cells in the chart above provide estimated quantities of light fixtures required
to provide a minimum of 25 average, initial footcandles for a variety of room sizes.
The top-left quantity in each cell is for 15' mounting heights,
and the bottom-right quantty is for 25' mounting heights.
15'
40'
60'
80'
100'
60'
140'
160'
20'
20'
40'
80'
Width of Room
Except 20'x20', 20'x40', and
40'x20', each of which has
fixtures spaced 10' apart.
25'
From
Wall
5 - 15'
5 - 15'
Space
Apart
15 - 20'
15 - 20'
Mounting
Height
Length of Room
Fixture Spacing
(25 Minimum, Average, Initial Footcandles)
120'
140'
160'
Example:
100' x 60' room, 25' mounting height = 18 fixtures
100'
120'
60'
100'