I bought both the BT20 and BT30 to try them out.

The BT30 is not what you'd think. It's a very wide light. The BT20 is actually a better light for going far down the road, the BT30 is a light for people who want to feel like they can see everything if they might turn - and they don't go that fast. The BT20 let me see further down the road than the BT30, though it wasn't as wide of a beam. The drawback of the BT30 is it puts a lot of light in the nearfield, and it reduces your ability to see down the road past it.

The kind of light they put out was nicer on my eyes than the usual harsh blue/purplish light, but I didn't think either was as nice as the kind of light the philips saferide v2 puts out. Still very annoyed they left the bike lighting business, other than their non-great battery management, they really knew a lot about lights.