The need for lighting caves, particularly during the 'exploitation creates a strong alteration of decor, because enables organizations to plant photosynthesis ie greening and descend large surfaces. The problem can be reduced by choosing lighting so conducive to a minimum plant photosynthesis. After research has found that the range of white light radiation of 520 mM [5200] until 589 mM [5890A] is slightly favorable for photosynthesis.