The All Pupil II Neutral LED Module plugs simply into the back of your All Pupil II to give you all the benefits of LED illumination. LED provides better detail, brighter, whiter illumination Freedom from purchasing bulbs The LED life expectancy is up to 10,000 hours 5 year warranty The All Pupil II Neutral LED Module plugs simply into the back of your All Pupil II to give you all the benefits of LED illumination.