I posted back in Jan/feb my findings with drop in H4 led bulbs. Been running them since then, loved the low beams, didn’t like the high beams so much and hated the weak station fm interference.

Just installed a new pair, same manufacturer but with some improvements. Radio interference gone, yea!

No night time test yet, but daylight test against garage wall makes me think that the beam pattern is tighter. 

Anyhoo, pics and blather here

https://shufti.blog/2017/10/17/vanagon-led-headlight-h4-bulbs-next-chapter-part-1/

Alistair