A simple gizmo that does what it says it will -- allow a standard 3-way bulb to work properly in a mogul lamp socket. The price is right too except for the extra charge for shipping, but it's still a good option. I will caution anyone thinking of using a 3-way LED bulb to replace an incandescent 3-way mogul bulb to look at the shape of the LED bulb in the context of your lamp. Many LED bulbs flare out just above the screw threads considerably wider than the same spot on the old mogul bulb. If your lamp's opening above the socket is too narrow, those LED bulbs won't screw down far enough to make electrical contact. There are LED bulbs with narrower, longer necks, but you may need to search for them.
After two purchases that did not work, I located the mogul to standard adapter offered by ledradiant. The online information stated that it would work on 3 way lighting. It arrived earlier than they advertised and it worked! Good product, good company.
I have a special floor lamp my parents got around 1940. I wanted to replace the 3-way bulb with a similar LED bulb. I was shocked when I removed the old one - it was huge and had a base much bigger than a standard bulb. I learned it is a mogul base. I went to the electrical department of the 2 large home supplies stores in my area. One showed me a base adaptor and said it would only work with a 1-way bulb, then suggested I call a handy man to change the wiring. The other insisted their base adaptor would work with a 3-way bulb. It did not. I continued to search the internet and found the Mogul to medium base adapter converter here. I cannot tell you the joy when I attached it to the new standard 3-way bulb, then screwed it into the base and turned the switch. It worked! I didn't even have to raise the flaps on the base. Thank you!
I can backup all the reviews that have been posted, that this device works, and is the best. I can add one thing which may help someone. My antique Mogul 3-way lamp has a large diameter shallow glass shade. For this reason the total length of the bulb or any bulb/adapter combination cannot exceed 6.8 inches or else you will see the bulb poking up above the shade. That is not acceptable. Again, this adapter is best, because it does not add any length to any bulb you use! Sadly, all the NEW LED bulbs Mogul or Standard base are too long, or its design is such that only a small portion of the bulb actually puts light out. My lamp depends on light coming from a more full 'globe' such as a classic bulb. Until the LED technology advances I depend on devices such as this.
I think I have a lamp fetish........I have 2 really old Mogul base 3-way switch floor lamps that I wouldn't throw out and I looked online for adaptors that would allow the 3-way switch to operate correctly. Only this one works! I was tired of spending a fortune on Mogul base lightbulbs and this worked like a champ! Thanks!
After reading Jim's review, I decided to see if this would work with my vintage lamp's 3-way mogul base. It does! I have found no other mass-produced adapter with that functionality. The one downside is that a medium-base bulb with this adapter will sit really deep in a mogul socket,
I ordered some corn bulbs from this same store but didn't ask for mogul base and my fixtures are all mogul. Called and they sent me these adapters at no charge, I only paid the shipping. Easy to convert but it didn't work. I tried the bulb in a regular socket and then realized that the center was not making contact as the regular mogul is longer than the residential, just lifted the flap at the center of the bases with a wood stick and all works perfect.