Just chucking up some info, I recently got set of IPF 900 series spotties for my Jackaroo, $200 of Ebay. I was pretty happy with the performance. Then a mate suggested getting HID bulbs for them. Back to Ebay and I got a set of HID bulbs (H3 - 6000k) for $100 from some chinese mob, apparently most of the HID bulbs come out of the same factory anyway. Service fast.
http://cgi.ebay.com.au/CAR-HID-XENON...d=p3286.c0.m14
WOWWWW is the only thing I can say!! they are easy to install on existing spotties, only have to drill a hole in the back of the mounting to feed the wires though and also you have to mount the 2 ballast boxes somewhere too.
They are awesome at lighting up the road, for anyone who hasn't been in a car with them, its like a mega bright moonlight lighting up the road ahead, and you dont get the bad reflections of signs etc. Definalty the best addition I have ever made to my fishing rig.
So for anyone considering getting HID spotties, I highly reccommend this method of doing it. Cost me $300 for something that that would cost over $1000 i reckon...and it was easy to do...I am certainly no auto electrician either!!
cheers steve