I've had Osram CBI's for about 4 years now and they have decreased in luminosity.
Also noticed difference in shade between left and right one, when front parked up against the wall.
They were much brighter than oem ones, when new but got replacements on my to-do list anyway.
Am considering Philips Xtreme Viision v.2.
They offer brighter light output of 150%, apparently.
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