Have a look at the lights on the DLS by searching for Author "kj3400"
I find this extensive series to be quite satisfying. When I first got them, they did have a few missing deps that turned out to be a few of the arrow lenses such as the diaginal turn arrows. These did have the standard left, right, straight, and left/right u-turn arrows. It has been a few years since I DL'd them, so I can not say if these have been tweaked to include these missing assets or not, so be advised at least.
A few of the types that this creator has is 3 aspect, 4 aspect, 5 aspect, and flashers. They also have horizontal and vertical layouts. The housings are in black, yellow, and black face with yellow backs.
These are all floating style assets that require an independant mounting asset.