Miata Mailing List: January 2000, Message #327

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>Hella Vision Plus 55/60 Light Assembly
>Hella H4 55/60 Light Assembly (off road use)

They're both H4 systems.  The Vision Plus is the DOT-legal version.  It has
little nipples on the lens (apparantly for aiming purposes, but you don't
need them), a less distinct cutoff in the pattern, and drain holes.
Ironically, it's the one that seems to suffer from condensation problems.
The "off-road" assembly is the European setup with a sharper cutoff and no
condensation problems.  They look almost identical.  I've been running the
Euro-style for over 5 years, and I have never had any problems.

>Also, how difficult is the extra wiring required for the 55/100 bulbs?

The stock Miata wiring will handle up to 90/130W bulbs with no
modifications.  Upgrades don't come much easier than this!

Keith