The link you provided is pretty cool- I like that the lights integrate into the bike. I wouldn’t consider them though for a few reasons.

• What you mentioned- price
• Not bright enough for what I prefer
• 4 hour run time at which point you need to plug it in so your whole bike needs to be near the outlet

They say 4 hours is plenty to get you thru a week of commuting…well that’s a baseless claim. I loathe meaningless claims like that. 4 hours is fine for run time, but a detachable light can then be brought into work/home and easily charged compared to how this must charge.
200lumens on the spacer light isnt a lot of output to easily see and be seen at night.
I do like the post mounted light which is 100 total lumens, so 4 25lumen lights facing to the sides and rear. Good to see they include lights to be seen from the side.

I use a Cygolite Metro 550. It’s a 5watt light, has a day mode off-tempo flash mode, and disperses the light well at night so it gives a wide illumination while still making it easy to see far ahead. It isnt retro. It isnt classic. It isnt incorporated into the bike’s design.
But its cost effective, illuminates far and wide, and doesn’t blind people coming towards me(cheap CREE lights with a narrow beam do).
Im all for period correct when it comes to the bike, but not at the expense of safety(what I perceive as safe or not).