This is the Bright Source 40w 1200x300mm LED Panel light panel that is suitable to be installed in all recessed applications. This super bright LED panel has a high lumen output of 3600 lumens and offers users a 37.5% energy savings. The panel emits either a warm white, cool white or daylight colour (selectable in the drop-down menu) - 3000k/4000/6000K and has an average life of 50,000 hours. We offer a 5-year warranty on every panel for your peace of mind so in the unlikely event of a failure we will replace like for like any faulty components or the full panel & driver. TRIAC Dimming otherwise known as phase-cut dimming, TRIAC dimming act as a high-speed switch and are used to control the amount of electrical energy passing to the lamp. A \'trigger\' dictates what point the device starts to conduct the electricity, the quicker the switch reacts the more power is let through and the later it reacts the less power, resulting in dimming of the bulb. TRIAC Dimmers include leading and newer trailing edge switches. Tridonic Dali dimmable LED driver to enable this panel to be dimmed via a PC or Wall Interface system. It can be dimmed as a group or singular. This also enables the fitting to work on a corridor function and have options for pre-set scenes. 0–10V dimming driver sends a low DC voltage signal to the fluorescent ballast or LED driver. The lighting changes as the voltage is varied. So, at 0v the light will dim to 0% and turn off. At 10v the driver is operating at 100% and the light will be fully on. A 0-10v dimming system can operate 10 LED products per controller. DSI - The driver receives a digital signal which tells it how to respond. The advantage of digital dimming is that fixtures are addressable. You can also have many more different levels of light output. General CharacteristicsWattage [W] 40Voltage [V] 230Lumens [lm] 3600Dimensions [mm] 1196x296Beam Angle [°] 120Average Life [h] 50,000Colour Temperature [k] 3000, 4000 or 6000Dimmable? No