Not on my WRX, but I mounted a 32" OPT7 C2 Flood/Spot combo on top of my Outback. I mounted it inside the front of my Yakima basket, so it was hidden behind the flip-down fairing.
I bought it from Amazon last May for $200, but they are $136 now.
http://amzn.to/2fR0Dbu OPT7 seems to be one of the better regarded mid-tier LED light companies.
Now it is mounted on my 4Runner. Here's the output from the Xenon Depot HID 4300k Philips low beam kit. (all photos taken in manual mode with the same exposure for accurate comparison.)
and here's the output with just the LED light bar.
You DO NOT want to use these on public roads!
And just for gits and shiggles, here's the output on the 4Runner with the HID low beams, stock high beams, OPT7 32" light bar, and Baja Design Squadron-R Pro amor wide/cornering fogs.