The Telrad Reflex Finder is very popular with astronomers for use with telescopes. However, the Telrad Sight has also found wide adoption in the stage lighting industry. It works very well as a spot light sighting device for professional concert and stage spot light operators or for other terrestrial applications during daylight hours. | This special version replaces the red LED light found on the astronomy version with a much brighter white LED light that makes it very easy to see the circular reticle pattern, even in broad daylight. The pattern consists of 3 concentric rings with diameters of 4°, 2° and 0.5°. | 8.15" long by 2.24" wide at the base. Please make sure that your spotlight has sufficient clear space to attach the Telrad finder. The finder attaches to any curved surface using double-sided tape on its base (included) or Gaffer tape (not included). No drilling is required. The Telrad finder can be separated and removed from its base for storage. | Weighs approx. 11 oz and requires 4 AA batteries (not included). Total height is 4.92". Robust ABS plastic construction. | NOT for astronomy use. For astronomy applications, please see the red or red/green versions of the Telrad that are sold separately.