Cut Sheet

6 | Lutron Lutron | 7
Measured light vs. perceived light
The human eye responds to low light levels by
enlarging the pupil, allowing more light to enter the
eye. This response results in a difference between
measured and perceived light levels.
A lamp that is dimmed to 10% of its maximum
measured light output is perceived as being dimmed
to only 32%. Likewise, a lamp dimmed to 1% is
perceived to be at 10%.
At full brightness, the measured light in a space is 60 foot-candles.
At the lowest dimmed level, 10% perceived light is desired.
Measured Light
100%
90
80
70
60
50
40
30
20
10
5
1
0 10 22 32 40 50 60 70 80 90 100%22 32
Perceived Light
Design example
1% measured light is
perceived as 10%
(desired result)
5% measured light is
perceived as 22%
(2x brighter than desired)
10% measured light is
perceived as 32%
(3x brighter than desired)
Selecting a Lutron ballast or driver
Lutron offers several ballast and driver families that have various dimming levels and control options
to suit anyapplication.
Low-end
dimming level Control options Ballast family Available lamp types
1%
EcoSystem
®
digital link
EcoSystem H-Series
T8 linear and U-bent,
T5 linear, T5 HO linear
EcoSystem
digital link
and 3-wire
Hi-lume
® 3D
T8 linear and U-bent,
T5 linear, T5 HO linear
3-Wire
Hi-lume
T5 HO linear,
T4 compact
5%
EcoSystem
digital link
and 3-wire
EcoSystem
compact
T4 compact
Hi-lume 3D
T5 twin-tube
T5 HO linear
(80 W only)
2-Wire
Tu-Wire®
T8 linear and U-bent,
T4 compact
10%
EcoSystem
digital link
and 3-wire
EcoSystem
T8 linear and U-bent,
T8 reduced wattage,
T5 linear, T5 HO linear,
T5 twin-tube, T5 twin-
tube reduced wattage
Low-end
dimming level Control options Driver family
Compatible
LED types
1%
EcoSystem
digital link, 3-wire
and 2-wire
forward phase
Hi-lume A-Series LED driver
Most LED loads of
40 W or less
EcoSystem
digital link
EcoSystem LED
driver (CE)
Most LED loads of
25 W or less
Fluorescent Ballasts
LED Drivers
Lutron® | Lutron® |
Understanding Lutron ballasts and drivers
Understanding Lutron ballasts and drivers