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+1 on what KumaRide said. Custom Dynamics Genesis clusters are bright. We have them in the front and back turn signals on our bikes and are amazed at how much more visible the bikes are to others. Money well spent in my opinion.
LED's to light up the bike or for signals and taillight? Custom Dynamics is great stuff. The Kuryakyn's are rather bright for signals as a riding partner has those as well. I have the Harley LED brake light that is nice and bright too.