Lighting is an essential element of video production. Like the human eye, video cameras need to have an adequate amount of light to produce an acceptable picture. The most developed type of lighting instruments used in television and video production utilize light emitting diodes (LED) to create light. Lighting directors have a variety of lighting tools at their disposal. They include a variety of floodlights, spotlights, and soft lights designed for use in the studio and/or in the field. Lighting instruments may be fixed beam or variable beam. Variable beam lighting instruments allow the lighting director to adjust the beam of light produced by the instrument. Lighting instruments that are designed for use primarily in field production settings need to be smaller and lighter than their studio counterparts. One of the great challenges of lighting in the studio is to make what is essentially an artificially constructed environment appear to be realistic and natural.