Editing Tactical light (section)

===Illumination types===
Tactical lights can be fitted with lenses to produce certain colors,  Colored lights or filters provide flexibility for different purposes. Red lights are best{{citation needed|date=November 2022}} for preserving [[night vision]] for the law enforcement officer, due to their minimal impact on the [[rod cell]]s in the eye, while blue light provides high contrast for detecting [[blood]].{{original research inline|date=October 2012}}  Light in the [[infrared]] spectrum is only visible through [[night vision]] devices, allowing the operator to see clearly while reducing the visibility to those not equipped with night vision equipment. Tactical lights are sometimes combined with a laser to form a multifunction unit, able to provide low-light targeting, illumination, or both.