One thing is for sure, you're not going to get zapped by the brightness of the LEDs..... if that is what you are worried about.
LEDs in principle require very little current to light up and are not actually counted as a load on the PSU. Just change them for the ones that fit the size and you shouldn't have to worry about anything.
you could try to find something like the same or the closest to matching them. You can get the ditto same ones only from the company I guess, and I bet they don't sell them without the fan.....if we were in China, I bet' we'd be able to get the exact match though.