What is the Difference Between a 912 and 921 Bulb

Question

Question:

I see this light uses either a 912 or 921 bulb. Whats the difference?

asked by: Rodger W

1

Helpful Expert Reply:

The 921 bulbs are easier to come by than the 912. For a 921 you can use # A921B. For the 912 there is only an LED option, # AR50610. The 912 bulb is polarity sensitive so if it doesn't work take it out and turn it 180 degrees and reinsert it.

expert reply by: Michael H

1

Answer 1

Yes, the 921 bulb #VA0415-00 will work well for you. The 912 and 921 bulbs are interchangeable as they have the same T-5 wedge base. The 921 has a wattage of 16.8 and draws 1.4 amps. The 912 is 12 watts and draws 1 amp. So the 921 should burn…

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Answer 2

The Gustafson RV Vanity Light #277-000322 that you referenced uses 921 style bulbs which if you wanted to go with a low power consumption option you can easily use LEDs like the part #DI74ZR which puts out a warm white color which is easier on the…

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Answer 3

A Reese Revolution and a Sidewinder Pin Box are essentially the same thing. It is simply called a Revolution when it comes as OEM/factory equipment on a trailer. The aftermarket product is called the Sidewinder. There are some very minor differences…

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Answer 4

Hey Andrew! Yes, Furrion does have a Chill Cube model with a heat pump. This was actually just released for aftermarket sale. You will need a complete system to make the switch, new R32 units aren't backwards compatible with old R410A systems.…

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Answer 5

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 6

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 7

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 8

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 9

Hi Paul, you’re definitely on the right track here, and I can help you narrow this down with confidence. With your tandem 3,500 lb Dexter axles and 33 inch spacing, both the Dexter EZ Flex part #K71-652-00 and the Lippert Road Armor part #LC53CK are…

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Answer 10

Hey Melanie. The reason you can't find a replacement for your GE ARC15AACBL2 15,000 btu air conditioner is because they phased them out. In 2025 all RV AC systems had to change over to a new coolant called R32. This was a EPA mandated decision.…

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Answer 11

Hey Jeff. There is definitely a correlation between weight and capacity. I've listed the weight of all three of the Power Mountain Tallboy Off-Road Bottle Jacks we have below: Power Mountain Tallboy Off-Road Bottle Jack - 7-15/16" to…

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Answer 12

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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What is the Difference Between a 912 and 921 Bulb

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