he PLM04 is the successor to the popular PRO Lamp Module, the PLM01! The PLM04 Lamp Module makes adding X10 on/off and dimming control to your higher wattage lights simple & easy. It offers instant plug-in control of incandescent bulbs rated 40-300 watts and offers dimming control (with Automatic Gain Control) even if the lamp wasnt able to dim before. This module also responds to "All Lights On" command - a feature you have come to expect from X10 Pro gear.