The simple design of the Burk spot head light from Tech Lighting is inspired by telephoto camera lenses and utilizes a powerful LED source harnessed by field changeable optics for precision beam control. Multiple CRI and CCT options make this head highly effective in both residential and commercial applications. Includes field replaceable 12 watt, 740 delivered lumen, 27000K, 3000K or 3500K LED module. Integrated lens holder accommodates up to two MR16 sized lenses or louvers (sold separately). As a general rule when using the Burk head, Tech Lighting 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 Tech Lighting Technical Support Department Dimmable with low-voltage electronic or magnetic dimmer (based on the transformer). As a general rule when using the Burk head, Tech Lighting 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 Tech Lighting Technical Support Department