In this category we have Par 38/R40 type strip lights and MR 16 style units. Fundamentally the difference between them are the lamps that they use. The Par 38 / R40 version is more a traditional flood light. The lamps generally range from 120 to 300 watts. Recently these lamp choices are becoming more restricted with legislation looking to reduce power draw and increase efficiency. The MR 16 lamps are a low voltage that have a high output with a low draw. The one draw back to the MR 16 version is if one lamp goes out the entire circuit goes out.