I've tried a number of different LED headlamp options. The LED bulbs just don't have the proper focus for lamp not sedsigned to work with them Amazon has so many to choose from. If you have the round headlamps due to the Harley and jeep communities there are a number of 7 inch round LED headlamp assemblies available. Some of these work great along with adding daytime running lights and also turn signal function. Here is a link to a set I just installed. 
https://www.amazon.com/gp/product/B01AATTMKO/ref=oh_aui_detailpage_o03_s03?ie=UTF8&psc=1

For the South African high beams bulb choice is limited as there in limited clearance on the left side for the driver-heat sinks on the LEDs. I found this set and got them to work. 
https://www.amazon.com/gp/product/B012KF1ZH4/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

While these are only 2,500 Lumen each the light output is quite nice. Combined with the outer LED high beams the light is amazing. Even the low beams are awesome. 

I would really like to keep the rectangular lights. I am looking for a way to mount the 5 x 7 rectangular LED headlamps.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Alistair Bell
Sent: Sunday, February 12, 2017 10:54 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Those h4 led bulbs again

I've been running them for a couple of weeks now. I'm still on the fence about them. I love the low power draw, I still get a kick out the instant on and instant high beam effect ( yeah, I'm easily amused. But the quick switching is so apparent). But I'm still disappointed by the high beam performance.

This evening I did a quick and dirty comparison of the led bulb and an 80/100w halogen bulb. One in each lamp. Pics were taken, conclusions might be drawn.

https://shufti.blog/2017/02/12/vanagon-h4-led-bulb-update/

Alistair