Simple Plug-in Installation. For most of the cases, the only tool you will need is a screwdriver for the mounting bracket. Bright 900 Lumen (about 20 percent brighter than most under cabinet lighting available in the market). Each individual unit has Bright 49 LED Only Consumes 15 Watt Maximum. Saves at least 80 percent on energy. 24 Voltage (24VDC) offers highly energy-efficient, minimum heat contribution, longer life span, and safer. The light distributes in 180 Degree Beam Angle to optimize and maximize lighting under the cabinet. Easily Control the Brightness to the desired level using the inline dimmer switch. To ensure maximum safety, Modular LED Light Panel and Power Supply have been Certified by UL. What's Included 3 x Dunn 12 Inch Cool White (6000K) Modular LED Under Cabinet Lighting Panel 1 x 24 Watt Power Supply - Link Up to (4) Dunn 12 inch LED Panel 1 x Dimmer Switch 1 x 4 Way Splitter 3 x 3ft Interconnect Cable 3 x Modular Connector 6 x Mounting Bracket w/ Screw If you want a different dimmer type, please select from “Dimmer Type (Optional)”. For more information, use the link below to learn more about each product. Dimmer Switch for Modular LED Under Cabinet Lighting (Black) – Model: K6032 Rotary Dimmer Switch for Modular LED Under Cabinet Lighting (Black) – Model: S4170 Wireless Dimmer Switch (Dial Remote Control + Receiver) for Modular LED Under Cabinet Lighting – Model: J4070? [Dimension] Dunn 12 Inch LED Light Panel 11.81 x 1.48 x 0.30 Inch. (300 x 37.6 x 7.62 mm) 24 Watt Power Supply 3.82 x 1.77 x 1.14 inch (97 x 45 x 29 mm) Dimmer Switch 3.29 x 1.08 x 0.44 Inch (83.56 x 27.43 x 11.18 mm) 4-Way Splitter 1.64 x 1.30 x 0.59 Inch. (42 x 33 x 15 mm) Modular Connector 0.57 x 1.48 x 0.30 Inch (14.45 x 37.6 x 7.62 mm) Hardwire Installation If you plan to use a wall dimmer switch, you need to do the hardwire installation with a dimmable transformer, instead of the included power supply which plugs into a wall outlet, due to the voltage difference between the wall dimmer switch (110V) and LED light panel (24V). The inline dimmer switch (24V) is incompatible with a dimmable transformer. If not used with a wall dimmer switch, a plug-in power supply (except a wall mount power supply) can be used to do the hardwire installation, but if a dimmer switch is needed, a 24V dimmer switch is required. You would need to splice the power plug from the power cord and connect it to the power source with a junction box or something similar. The wall dimmer switch (110V) is incompatible with the plug-in power supply. Power Supply Start-Up time Depends on the wattage of the power supply, the start-up time may differ. Please use matched wattage of power supplies for the best result.