Light Control for Fish Tanks

Abstract

Abstract Photoperiod effects on fish are well known, but other aspects of light control for fish tanks, including light-shock reactions caused by abrupt on-off changes in lighting, have received less attention. This article provides a discussion of light control equipment—especially timing and dimming devices—available for fish tanks, lists information about some of the units that are commercially available in North America, and mentions some systems developed by fish culturists.