I designed a 3D printed LED ring to go on the spindle of my G0704 mill. There are other similar designs out there, but I enjoy creating this type of thing and had to upgrade it slightly so I designed it to support 2 LED ring lights.
I designed it to work with a 100 mm and 110 mm LED rings. These sizes are commonly available in a 12V for automotive applications..
You can get an .stl from here: G0704 spindle LED ring light by pwkalahar - Thingiverse
Or a cad file from here: https://grabcad.com/library/g0704-sp...d-ring-light-1
If you want to do this, but don't have access to a 3D printer, I am selling some on e-bay: G0704 LED Ring Light 3D Printed Holder Only | eBay
And if you aren't an E-bayer, you can private message me, but I can promise my response times will be better through e-bay.
To clamp to the spindle it uses these heat set inserts:McMaster-Carr
and these screws:
McMaster-Carr
You could also use a regular nut too with a little longer screw.
Here are the specific electrical parts I used, but anything similar should work just fine.
http://www.ebay.com/itm/301698086931...%3AMEBIDX%3AIT
http://www.ebay.com/itm/381343608784...%3AMEBIDX%3AIT
http://www.ebay.com/itm/221901466515...%3AMEBIDX%3AIT