Depends on the ballast? I know that the Solis-Tek 600 watt dimable can. As shown below:
[h=3]Product Information[/h] FEATURES:
- Dimming: SolisBoost - 600W - 400W - 360W.
- 120V/240V (90-260V)
- Metal Halide (MH) & High Pressure Sodium (HPS) Lamps
- 2 power cords included
- Soft Start Technology
- Powers 600w & 400w lamps.
- Constant Power Factor 99.9%
Ignition Control™ – Revolutionary safety measure. Whether you are powering up 10 units or 100 units of Solis-Tek Ballasts, the electrical draw is controlled by our internal software. Our software will ignite lamps at different times within 5 seconds with soft start technology in order to protect breakers from overloading.
This is especially important for automated systems to protect against inconsistency in lighting schedules.
Connection Awareness (Pre-Ignition Checks) – Solis-Tek units will not ignite without a complete and proper connection. The ballast conducts a 3 second test of the connection circuit. If the circuit is incomplete ignition will be prevented in order to protect the lamp.
PRE-IGNITION CHECKS FOR:
-Open Output -Short Circuit
-Ignition Failure -Thermal
-End of Lamp Life -Overflow Current
-Over/Low Voltage -High/Low Temperatures