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You are watching: Will a t8 work in a t12 fixture


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T8 lamps top top a T12 ballast, or T12 lamps on a T8 ballast will certainly both fail prematurely. The only difference in the fixture chin is typically the ballast and also the sockets. T12 will commonly have unshunted sockets, and also most T8 will have shunted sockets. Placing the wrong ballast in will certainly either underdrive or overdrive the lamps leading to the failures. Hope that answers her question.
Using T12 lamps on a T8 ballast would be as with an LED retrofit. You will reduce power use, due to the fact that the wattage walk down, however you lose output together well, again, as with most LED retrofit. The T12 4" lamp will look approximately like a 3 foot 25W desk lamp or a 4 foot 25W power saver lamp.
Most T12 ballasts room magnetic quick start. They"re single application products. Many T8 ballasts native the last 5 year or so have the right to take anything native 120 to 277v input and rated for 2-4" lamps and T12 lamps will appear like a 3" lamp to the ballast. It"s tough to fry one as well as lifting a neutral top top 277v and zapping the 480v. There"s no damage in waiting out till the lamps burn out or area wide replacement if a couple of T12s acquire installed accidentally. No damage to the ballast/fixture, however don"t gripe if the T12 lamps burn the end in 6 months. You"ll have problems with starting, flickering or bad output nevertheless of ballast/lamp combo if friend use decreased wattage lamps if that cold sufficient to be uncomfortable for people, just use complete wattage lamps. They"re no rated for use under 60*F.
Point bring away EL.....I"ve regularly wondered, but haven"t askedhow does a universal ballast work? :001_huh:~CS~
Point taken EL.....I"ve frequently wondered, however haven"t askedhow does a universal ballast work? :001_huh:~CS~
It"s a (nearly) consistent current strength supply and various T8 lamps space rated because that the very same amps. The ballast have the right to accommodate a wide variety of voltage while still delivering the very same current. The entry side functions like worldwide worldwide voltage range phone chargers.
Here is an older thread ~ above this .http://www.historicsweetsballroom.com/f30/t8-bulbs-t12-fixture-29804/check out article 11 Pete
T8 lamps on a T12 ballast, or T12 lamps on a T8 ballast will both fail prematurely. The only distinction in the fixture itself is typically the ballast and also the sockets. T12 will generally have unshunted sockets, and most T8 will have shunted sockets. Placing the wrong ballast in will either underdrive or overdrive the lamps bring about the failures. Hope the answers her question.
Speaking around shunted sockets and whatnot, I always loved the function of T12 solitary pin sockets where removing the lamp disconnects strength to the socket. Ns wish it was prefer that again instead of making use of those stunner ballast disconnects or simply cowboying it when replacing a ballast.

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Nothing if you have actually the correct ballast.A T12 ballast ~ above a T8 bulb will over drive the T8 causing it come fail early on.A T8 ballast on a T12 won"t offer you enough light (if it lights at all) because its gift under driven.A T8 slides right right into a traditional T12 socket choose butter. I simply did a couple myself.On the yellow wires occasionally you must tie castle all along with the single red on the T8 ballast unless it has the yellow wires top top it.That is the only worry I encountered.