The LC7000 4300K filter is for the Mini-Cool Daylight. It can used with indoor fluorescent lighting or direct sunlight to absorb red light. To be used with Mini-Cool in situations where direct sunlight or fluorescent lighting is dominant. It is the perfect filter for all video applications including direct sunlight, with minimum light loss. It selectively absorbs red light, but freely passes light at the blue end of the spectrum, so that light provided by the Mini-cool is converted to a light blue (4600'K).