ceiling-fanlight-fixturelighting
I have an existing ceiling fan with a light fixture that I would like to replace with track lighting and spot lights. For this purpose, I have bought the "TROSS" ceiling track lighting from Ikea
https://www.ikea.com/us/en/catalog/products/80262663/
The problem is: it doesn't exactly fit the space at ceiling fan after I have removed the preexisting light fixture. (see photo)
my question is: is there a standard way to install track lighting on preexisting ceiling fans?
No. First as you have mentioned there is line and low voltage. If you are not sure what to choose from pick line voltage - you can always put it on a dimmer to get what you need. The low voltage tracks in my opinion are junk because they only allow a certain amount of light, and the transformers go out or hummmm after a while. That is just my opinion on this - people will say you can find more selection of light bulbs with low voltage and there are special circumstances where this is right but you can order a lot of stuff easy on the internet now.
OK back to your main question. No again. In the US there are three main types. See the picture below.
Get a ladder and take a look at your track or take a picture on your phone. The Juno tracks I have seen have been j-style but you need to look because they are a huge maker and I am sure they have made each style.
If you don't know, get an electrician. Your life and property are at stake.
I could make some educated guesses here but if you followed them, had a problem, and I found out about it, I'd feel bad.
Best Answer
That would be "altering the fan". Fans aren't standardized.
What you've done is disassemble the portion of the ceiling fan where the lamp(s) hang down from below the blades. Those parts of a ceiling fan are not standardized and are totally proprietary to that fan's make and possibly its model. Nothing will bolt to that, except spare parts for that fan, or other fixtures made by that fan's manufacturer which they have sent to Underwriter's Laboratories to have tested and listed for retrofit.
The reason testing/listing is important, and you shouldn't just jack-rig any old thing, is that fans vibrate. A lot. The new thing would need to be tested not only to not fall apart itself from the vibration, but also for its attachment point to be durable. The Ikea item is not tested or listed for that extreme use, and so, you'd have liability problems if your hack was discovered to be at fault for fire or injury.
Generally the more an item extends out from the fan hub, the more the vibration will affect it, so track lighting is a worst case scenario.
The "standard" attachment point is the one the fan is attached to. So you would have to remove and dispose of the fan, and use the Ikea kit instead.
There are proper ways to extend wiring off a ceiling junction without altering the ceiling itself. But the fan adds a big wrinkle: any such kit involves shifting the fan downward an inch or two. You must assure it properly supports the dynamic weight of the fan, with vibration factored in.