it was a pain in the arse as hilux's are negative switched, and trying to hook these spotties up was a absolute head-fuck! once I figured it out, i then found out the wiring was too small guage for such a big power draw, and had to re-do the whole lot with a bigger harness.... and for the same result! melted 30amp fuses and fuse holder. the 30amp circuit breaker did the job, and for some reason I never had anymore trip outs after i installed it. 

also for the record, I went back to HID lights (narva). they are a much lower power draw, cooler, and certainly have more long distance punch. the biggest difference though, was the Kelvin/temp/colour range on the HIDs. the LED's reflected the big road signs too much for my liking. i'd have to squint as I drove past any sign, as the reflection was too bright. I opted for a lower Kelvin temperature/yellower light on the HID's, and dont have nearly as much a problem. yes they take approx 5-10 seconds to completely warm up, but they are a better driving light overall in my opinion. 

 Heat sensing/ infrared scanners are available to check for faulty joints and can save vehicle and house fires and are relatively cheap. Some use a LED display nowadays and the ones I bought for Telstra used a display of individual LEDS in a sliding type display and the use was part of standard maintenance procedure. Also using a digital voltmeter and checking voltdrop across terminals and fuses can indicate dry or faulty items. If you are in business you most probably can write of to tax.

Maybe just wear clean jocks this time Andy!