|An arrangement for automatically and reproducibly controlling and varying illumination in biological experiments|
Stewart, J.E. (1963). An arrangement for automatically and reproducibly controlling and varying illumination in biological experiments. J. Fish. Res. Bd. Can. 20(4): 1103-1106
In: Journal of the Fisheries Research Board of Canada. The Fisheries Research Board of Canada: Toronto. ISSN 0015-296x, more
Aquaculture equipment; Aquaculture systems; Aquaculture techniques; Controlled conditions; Lighting systems; Marine
This note describes a versatile and inexpensive arrangement for illuminating an extensive system of tanks, cages or other enclosures allowing the amount of light to be varied continuously and reproducibly throughout a 24-hr cycle. Repetition of the 24-hr program is automatic and the system requires no attention other than periodic inspections and the time necessary for making the appropriate program changes. Control is achieved through voltage changes in the power fed to the operating unit, thus the controls are quite easily adapted for use on any arrangement or instrument whose performance can be varied by voltage changes. The lighting system used in this laboratory illuminates 21 square tanks, each 3 feet wide, with one 10-watt, frosted, incandescent light bulb and wide bay reflector centrally positioned 3 feet from the water surface of each tank. Extraneous light is excluded from the bank of tanks by black polyethylene sheeting.