FAQ

Frequently Asked Questions
Decora
®
Universal Dimmers
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Leviton Manufacturing Co., Inc.
201 North Service Road, Melville, NY 11747-3138, 1-800-323-8920 Tech Line: 1-800-824-3005 Fax: [phone] www.leviton.com/universal
© 2017 Leviton Manufacturing Co., Inc. All rights reserved. Subject to change without notice.
* “Kick start” is a precise boost of energy applied to difficult to start CFLs to initiate smooth start up and prevent
flickering. This feature maximizes the usable dimming range by allowing the user to start at the lowest possible
dim/bright bar position.
 Why is there no light from the LED bulbs when the dimmer is ON at the lowest dim setting?
The universal dimmers have been designed to function with a variety of LED bulbs. Some LED
bulbs are more sensitive than others, and need a higher voltage to “turn on”. In order to fix this,
raise the low-end trim adjustment until the LED bulb turns ON.
 What if I use dimmable LED bulbs when the dimmer is set to CFL mode?
This is perfectly acceptable, especially if you encounter LED bulbs that are difficult to start at
the low preset dimmer level. In CFL mode the dimmer will provide increased energy or a “kick
start*” to start the bulb.
 I have some LED bulbs that seem to have a slight delay before they turn on, is this to be
expected?
It may depend on the bulb. If your dimmer has a soft on and off feature where it fades the lights
on and off as opposed to abruptly turning them on like a regular switch, there could be a slight
delay before some bulbs will turn on. While most will operate fine with the soft on and off and
changes to dimmer settings, there are some bulbs that have a built-in delay during those events
and it may take a moment or so before they will turn on or respond to changes in dimmer
settings.
 What will happen if I mix bulb types with the Universal Dimmer?
We strongly recommend you use the same light source to achieve consistent performance from
bulb to bulb. If you choose to mix bulb types on the same dimmer, it is possible that you will
experience a variation in dimming performance and start up characteristics.
 My lights sometimes turn off before the dimmer slide is at its lowest level. Why does that
happen and can I fix that?
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Some LED and CFL bulbs will turn off at different voltages. Leviton’s Universal dimmers have
a low-end trim adjustment so you can have the full range of the slider match the full range of
the bulb. See instructions for details on how to adjust for your specific dimmer.
 Is de-rating required when installing more than one Universal Dimmer in the same wallbox?
De-rating may be required if you have two or more dimmers sharing a wallbox. If you install
more than one dimmer next to each other and are using incandescent bulbs, it is required that
you reduce the load that each dimmer can control (de-rating). No de-rating is required when
using dimmable LED or dimmable CFL bulbs in multi-dimmer installations. Refer to the de-
rating chart in the instructions for maximum load per dimmer.
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Universal De-Rating Chart
Model 1 DIMMER 2 DIMMERS 3 DIMMERS
IPL06, 6672, 6674,
RNL06, RDL06,
600W incandescent
150W dimmable LED/CFL
Per dimmer
500W incandescent
150W dimmable LED/CFL
Per dimmer
400W incandescent
150W dimmable LED/CFL
Per dimmer
DSL06, TSL06 600W incandescent
300W dimmable LED/CFL
500W incandescent
300W dimmable LED/CFL
500W incandescent
300W dimmable LED/CFL
DSM10 (also suitable for
Magnetic Low Voltage)
1000W incandescent
450W dimmable LED/CFL
800W incandescent
450W dimmable LED/CFL
700W incandescent
450W dimmable LED/CFL