F40t12 Ballast Wiring Diagram - bought 3 of these ballasts at home depot for t 12 f40 florescent 4 foot l s only needed one ballast for one l only used the two red wires for one side of bulb and one mon yellow for other side of bulb fixture p div class b factrow b twofr div class b vlist2col ul li div price 19 92 div li ul ul ul div div div li back to sam s f l faq table of contents fluorescent fixture wiring diagrams wiring for preheat fluorescent fixtures the following is the circuit diagram for a typical preheat l one that uses a starter or starting switch good question this is mostly true however most people are still using mag ic ballasts when using this ballast the actual input wattage of a t12 34 watt bulb on a two l fixture is 72 watts a fluorescent l or fluorescent tube is a low pressure mercury vapor gas discharge l that uses fluorescence to produce visible light an electric current in the gas excites mercury.

vapor which produces short wave ultraviolet light that then causes a phosphor coating on the inside of the l to glow the foot candle is equal to one lumen per square foot and the difference between the lux and the lumen is that the lux takes into account the area over which the luminous flux is spread 1000 lumens concentrated into an area of one square meter lights up that





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