find LED lights that will do what you want

 

Thanks for all the great responses! I know diddley about electrical, but am thrilled to death to learn I have the 50 amp system! The Hella headlight and upgraded spots have been in the bike for quite some time with no issues, and I made sure to install a new wiring harness with ceramic plug, when I installed them. So far they have been trouble free, and I have been inside that nacelle many times for other reasons, and I always check for burnt or overheated wire casings.


No matter what auxiliary lights I install on the crash bar, I will certainly do so via a relay, and directly to the battery with heavy duty wiring as you guys recommend. Can't be too careful with the factory harness. I just want to make sure the system can handle it, because if I add lights, I want STUPID BRIGHT lights, otherwise its not worth it to me. I'm not looking for an upgrade, I'm looking for mega bright off-road lights for late nights on Virginias mountain and back roads. Lights I wouldn't dare use in the city for fear of pissing off cops. Like I said, what I am running now is a pretty darn good setup for most ANY normal condition. I want a set of lights for when I really.... REALLY, need them. But all your talk of LEDs will certainly keep me busy doing research for quite a while! So thank you!

 

It's one of the reasons I went with LED headlight, spots, turn signals and tail lamp (the other is more visibility), I'm also running 50 watt (100 combined) Motolights, heated grips, gloves and jacket and I have the adapter to run my spots with the high beam. At idle like at a light I would watch the volt gauge drop (even without running all the heated items), now it's really stable. Not sure if I was taxing the system but now I'm confident I'm not.

 

I need to learn how to figure this stuff out. I've got an 09 SG to which I've added Kurakyn driving lights, which use two 35 watt H3 bulbs. I've read that the add'l lights draw only 5.8 amps. I think that's for the pair. I also added a Biketronics 2180 amp and switched from the HK head unit to a Kenwood. Don't yet know the draw of the amp.

I replaced the volt reg. with an expensive shiny chrome version -- that failed in about a year.


Is the stock charging system on my 09 SG same as the FL's with driving lights? Can it handle what I've added?

 

Good news! You have a 3 phase 50 amp charging system, the same as the the Ultras.

 

jefla, I don't know what alternator your bike has, but as an 09 it is the first year of a major upgrade of the range, so I suspect it has a 50Amp one.

Amps = Watts/Volts

So your two 35 lights total 70 watts, divided by 12 gives 5.8 amps. It should be easy to find the wattage of your Biketronics amplifier, either from the literature for it or their website. I would be surprised if it amounts to enough to trouble your alternator!