I first came across these on toyotanation.com a few weeks ago. Today, I had a few minutes so I searched the 'net for more info. They look promising. Here's a good write-up:
http://www.hirheadlights.com/

They're called HIR bulbs, or Halogen Infrared Reflector. They don't create quite the same amount of light as HID, but they're close. And, they're about 1/5 the price of HID. They're also cheaper than PIAAs. Sylvania Silverstars are a good alternative and I'd love to see a side-by-side comparison since they're about the same price. I've found a set of 9006 bulbs for the Camry, but I can't find anything for the 4Runner.

 

Wolfpack TLC mentioned HIRs a while ago in this thread:
https://www.yotatech.com/forums/show...&highlight=HIR
I was going to call a John Deere dealer but completely forgot about them. Maybe wolfpack has some pictures of his lights.

 

Just called a couple John Deere dealers about HIR bulbs, first one didn't know what I was talking about, second one said he wasn't sure what I was talking about, but if it was for John Deere (I didn't want to say it was for a 4runner and not a John Deere piece of equipment), he could get it. So maybe someone else can chime in and give an idea of where to get the bulbs.

 

I have HIR bulbs in my IPF Driving lights. They are the H3 variety however. Here is a huge discussion on them and what they are all about.

http://www.hidplanet.com/forums/viewtopic.php?t=91

Also, I have pictures of the bulbs in my webshots account in my signature.

 

Here's a better option:

http://www.jcwhitney.com/webapp/wcs/...QveConRId0LF4t

 

"For off-road use only except (A) which meet DOT requirements." Only the direct replacement bulbs are DOT approved.