I want to change the lighting above our bathroom vanity but i perplexed with the existing strange fixture. (see Image below)
I am at a loss how to remove it. I do not see any type of markings or model number.
Any help would be appreciated
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That looks to be a built in LED light. No (easy) way to replace the light when it burns out, you are supposed to get a whole new light. This is a newish trend in lighting that I'm not in favor of. Its great for the manufactures, not for consumers or the environment.
If you are handy with electronics and know how to solder, you can replace it.
The white chip on the bottom of the large heat sink, that is the LED. Desolder it and see if there are any identification marks on it. If not you will have to figure out what new LED chip to get from the power supply in the light. Look at the voltage and the wattage it supplies.
Assuming you can deduce the correct replacement chip, and you found a source to buy one. Then you will need to apply a thermal paste to the new chip before you screw it back down to the heat sink. Last resolder the electrical connections.
Is it worth it? Sadly, probably not.
Just get a new light fixture.
It would probably be easiest to change the entire fixture. Keep that in mind as an option.
If you just want to change the "bulb" (not the LED chip, but the whole heat sink assembly in your picture) you would still need to remove the whole fixture from the wall, completely disassemble it, and buy lamp parts from a lamp part web site and change it all out to a standard light bulb socket, then put in a screw-in LED bulb.
Lots of possibly bad assumptions here: 1) the wire coming through the top of the metal dome in your picture is 120V, 2) you can find a combination socket and bulb that will fit inside the lamp shade that this is designed for, 3) it's worth all the hassle vs buying a whole new fixture.
Something LIKE this picture. You'd need to see how the current thing is held to the dome, and maybe adapt with new threaded rods, nuts, etc (all from lamp parts shop)