Yes, all Integral Lighting Xenon and LED fixtures are dimmable.
Generally, low voltage (12vAC) landscape lighting transformers are equipped with built-in timer and/or photocell controls. Many power supplies can be controlled by the following devices when the on-board controls are bypassed or disabled.
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Many controllers have minimum and maximum load requirements to maintain safety and operate properly. The controls listed above require 20 to 30 watts minimum but vary depending on manufacturer specifications.
The home control and LED industries are advancing at a rapid pace of innovation. This information is subject to change. When controls are desired, consult your equipment manufacturer for compatibility between power supplies, load requirements and fixture brands.
For more information regarding the use of dimmers with low voltage lighting systems, please read the Lutron Dimmer White Paper.