Not sure if the R4+ is in the shops yet – Hope state a September release but …
My wife bought the current R4 last weekend, the shop couldn’t find any details of when the R4+ would be released on the dealer only pages. We went out for a first night ride last night, it certainly seems very bright – even when 20 metres ahead I was using quite a bit of her light as well as my own (I’ve one of the original Hope Vision 2 lights). There’s quite a bit more spread with the R4 than the Vision 2 which seems more like a spot light by comparison.
Went the Hope route as we both have Vision 2 lights so have spare batteries. Some people prefer an integrated battery but those units have the problem that if you are out longer than anticipated then you could easily end up with no light. At least with an external battery you can swap to a spare battery, the Hope batteries are just a plain plug that you can connect/disconnect with your eyes closed.
The light unit weighs 80g so not that heavy for using on your helmet (the helmet mount weighs about 20g). The mounting is different from the older units so you can’t swap between them.