Update to some dyno testing:
Before the “Long Night of the Boat Shoe” I posted about testing the Trelock LS905 (with a Shimano 1.5W hub) against the IQ Cyo Premium (on a SP SV-8). I found the Trelock to be as good if not slightly better that the Cyo. They seemed about the same brightness but the Trelock had a better beam pattern.
Yesterday I rebuilt the Shimano wheel to a Sram I-Light D7. It’s a 3W hub with Sanyo internals. It has 36 poles which might make it smoother, and uses the Shimano style Lego connector.
Taking it out last night for a test - holy shit. It’s much brighter than the Cyo now that it’s getting a full 3W. They’re rated at the same 80 lux but the LS 905 has a narrower beam pattern that’s much more effective. It does have a funky artifact where it casts a narrow crescent out to sides of the road but it’s forgivable. Maybe that helps with side visibility? Overall, it’s definitely a class better. I wish I had an IQ-X to test against next.
I’m also glad to now know there’s a difference between using 1.5 and 3W hub, and with this light it’s a dramatic one. Maybe other lights are less sensitive. Maybe some of them are current-limited anyway in order to get different outputs at different price points using the same LED.
As for the hub, it’s been out of production for a while so any review wouldn’t be all that useful anymore. With the light off, it seems noisier than the other hubs I’ve tried. With it on, it’s about the same. I haven’t gotten any long rides on it though. It is one of the heaviest options, that’s for sure.