I vote for low power (35W) HIDs in your stock reflector housing and just point them down a bit more.
35W HIDS are a lot brighter than stock but are not totally crazy to where you'll be blinding everyone with your reflectors.
I vote no. Don't be that guy with HID's in reflector housings. Either get good halogen bulbs, or do a projector retrofit. Really the only two ways to do it right.
I suppose if your truck is lifted 10 feet high it could blind some folks.
Point them nice and low and as long as you're not using 55W HIDs they'd be fine.
Keep in mind many factory halogens output over 40-50W its just most of that power gets converted to heat.
Or stick them (35W) in your fogs.
It's not as simple as just aiming them down. The reflector is made for a different light source and has a lot more specific beam pattern than you realize. When you put in the wrong light source you might end up OK but more than likely you've distorted your beam pattern enough that you will blind oncoming traffic and even run the risk you won't see as much as you're supposed to even if it's brighter. Bright doesn't count if it's pointing on the ground 10' in front of you, with the rest going into the sky and oncoming traffic.
A higher power halogen bulb shouldn't affect your beam pattern, but you might exceed intensity or glare restrictions. You also run the risk of burning up your wire harness or even melting your reflector.
A projector retrofit, while not technically legal would be your best bet for increased performance without causing safety issues for yourself and others. The projector would be legal if coming from a street legal car, with the caveat that it was legal in the lamp it was removed from- the front lens will still affect your beam pattern but a clear lens like on the runner should be minimal. If the donor lamp had optics on the lens, your pattern will be out when using it on the runner. Using a lens with optics, like on the older runners would definitely affect your pattern. If you do wind up with a retrofit, be sure the projector is mounted solidly, and ensure the lamp is all sealed up when you're done. I'm not sure how the 4runner lamps vent as I've never taken one apart but that is another consideration to prevent fogging.
I just don't care to cut wires on a truck I'm not planning on keeping forever. Eventually I want to trade this thing for a 4WD 4Runner or a Land Cruiser.
Didn't want to bother with a HID upgrade, so I bought these ''PIAA 10704 Night Tech 60/55 Watt H4 Upgrade Bulb'' without much confidence I must say.
This sounds like a great upgrade here, I am curious is there a PIAA part number similar to this one for the factory fog light housings as well for my 2000 Limited by chance?
I replaced my factory fog lights with these: H3 H-120E PIAA Plasma Ion Yellow 2500K. I no longer need them since I've replaced them with the PIAA 510's. Sitting in the garage collecting dust.
EDIT: I don't have the PN handy. I wasn't impressed with the yellow fogs. They didn't project enough light for my satisfaction. I would recommend something different. EDIT: Part Number: 13556
Agree with Rock. The PIAA plasma ion yellow not to bright...I have these on now and like them better for the fogs.
HELLA HLA-H83135061: H3 12V 55W Yellow Star