I'm running last years 3600 Lumin 3 LED H4 bulb from Cyclops Adventure Sports that I installed in Nov/Dec.
http://www.cyclopsadventuresports.c...light-bulb-for-DirtbikesDual-Sports_p_97.html
I love it. It's way brighter than the halogen and it consumes much less power which would have prevented my OEM ignition switch from dying (too much power through one circuit). Also, my tacho works much better now. it worked up to 7k before now it mostly hangs with it until ~9k but it might occasionally settle at 7.5k and just hang out there while i bump into the rev limiter.
/electrical discussion
i really don't agree with you irlmike (*GASP*
), remember the US version don't have headlamp switches (ie, we can't turn the headlamp off). the 80W H4 pulls 20 watts more (which is as much as the LED pulls MAX) that's gonna be the headlight, running lights, gauges and idiot lights, ignition, starter, and coils all running through the contact switch at the bottom of the ignition switch. TOASTY! imo, one should never run a "brighter" headlight if it pulls more than 55-60W on any british bike.
/
back to my experience: i get noticed a lot more often. you can tell the difference in the perception from other vehicles. i can see better at night and been seen better. the high beam actually does something that can be noticed during the day (makes bottom half of headlamp illuminate).
the OEM lamp glass is lensed so it has built in cut-offs. all you need to do is be sure to tilt it below rear view mirrors while in areas with traffic. there isn't so much spill-over as to blind other drivers, but it definitely gets you more noticed. i had to remove the rubber seal at the back of the headlamp shroud, but nothing else required beyond that to make it fit. (it was a snug fit though)
cyclops adventure sports has since come out with a 4 LED 3800 (4400 max) Lumin H4. it is a warmer temp than my 3600, so it should provide even better illumination. this is the bulb stoanee has in his thrux (watch that tilt angle!)
http://www.cyclopsadventuresports.com/3800-Lumen-H4-LED-Headlight-bulb-_p_83.html?AffId=4
in my experience C.A.S. makes excellent, durable products that are of top quality manufacture. 12 month warranty too. no issues with mine so far. their products always come with adequate cooling designs for all fitments (sealed or open), both of the H4 replacements i mention have active cooling through built-in fans, as well as heatsinks to draw heat away from the diodes.
i also upgraded my 2-stage brake lights to LEDs. 1157 CAN bus 26 LED bulbs (we don't need it, but it helps regulate the power) in RED. you need to get the color matched to the housing with LEDs.
https://www.superbrightleds.com/mor...ed-bulb-dual-intensity-26-smd-led-tower/1166/
definitely more noticeable, especially if i flash my brakes. i have left my turn signals alone. i like the stock flashers, i have no issues with them being noticed, and i've only read about issues with LED mods.
i have replaced the gauge backlights with bright white LEDs, the bottom of the speedo has a little wedge 3LED white bulb on the bottom, to make it look mostly altogether. i haven't swapped out the idiot lights, mostly because i'm trying to save money for suspension upgrades. I also am not crazy about the prospect of accidently putting a bulb in backwards (LED bulbs are polarity sensitive) and not having an indication when the system triggers it.
that's my $0.02