I have some older set of the Speedhut gauges in - I actually like them because they are a near exactly match to the stock gauges, just white face.
Sorry I don't seem to have a photo of them lit up.
Mine are wired into the dimmer switch for power, with auxiliary controls in where the defrost button would normally be (my car doesn't have defrost). It has a dimmer switch separate from the main dimmer to control just the gauge faces, with a toggle to change them from blue to a bluish-green tint.
They are attached to the stock faces using 3M double-sided tape. The little needle stops have to be removed so the face can slip over and into position. You can leave the needles be as long as you don't let the backside of the gauge face touch the stock gauge (you'll have to put the tape on the backside before you move them into position).
I left the light bulbs in. The ones on the needles have to be left in, otherwise the needles won't illuminate properly. The only major thing is there is very minor bleeding on the sides at some angles, but it's not overly distracting.