You are purchasing 4 Lightolier L505WH resses downlights these trims will except different inserts or can be used by there selfs. They look great and will light up a big area. They take eather a 50watt Par 30 or a 75watt R 30 bulb.(not included) You may Use these in the Kitchen,Living room,Den,Bath room,or where ever you would like. The only Place you can't use them is in wet locations. For those areas look at our showerlights.