The simple design of the Burk head by Tech Lighting is inspired by telephoto camera lenses and executed with detailed care and precision. A powerful LED light source is harnessed by your choice of two field changeable optics for precision beam control. Multiple CRI and color temperatures options make this head suitable for both residential and commercial applications. Includes field replaceable 12 watt, 750 net lumen, LED module. Dimmable with low-voltage electronic or magnetic dimmer (based on the transformer). Integrated lens holder accommodates up to two lenses or louvers (sold separately). As a general rule when using the Burk head, we do not recommend using greater than 33% of the maximum wattage specified for the low voltage transformer due to inrush current requirements. For assistance in calculations, please contact our Technical Support Department.