Basic circuit kit, with a switch, (2) 'C' Batteries with Holders, (2) Light Holders, (5) Bulbs, and bulk wire for connecting, for a classroom or home experiment. One kit works well for a group of 3-5 students and demonstrates the pricinples of circuits and electricity
Biorb MCR light small grey, 15 from sunrise to daylight 7.5 hours of daylight, 15 minutes sunset to night light. This cycle can also be set in the same manner for 10, 12, and 14 hours
Biorb MCR light large grey, 15 from sunrise to daylight 7.5 hours of daylight, 15 minutes sunset to night light. This cycle can also be set in the same manner for 10, 12, and 14 hours
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