Well,no haze on the housing, just need to replace the bulb.
Excellent!
So I am looking for a h4 bulb to buy. I still need a sudgestion on that. I know what not to buy but dont know what to buy
If you take a look at:
http://www.rallylights.com/hella/H4.asp (chosen at random, I don't know anything about this particular company) you will see some characteristics they list for their H4 bulbs/
H4
The "H4" part refers to the mechanical size and shape of the bulb. Any H4 bulb should fit into any H4 socket.
12 Volt
The most common kind, and what you want for your Ford. If you bought 24 volt by mistake it wouldn't light, or would just have a sullen orange glow. If you bought 6 volt you would get a single blinding flash of light when you tuned it on, and then you'd need a new bulb.
Bulb Type
Halogen and Xenon refer to what's in the bulb. Both of these should be better (but probably pricier) than plain incandescent. "Hyper" and "Yellowstar" are their own words used for marketing purposes, there's no telling what they did to the bulb.
Coating
People put coatings on incan bulbs for cosmetic purposes. If you want your van to have mean blue or happy yellow lights that's fine, but if you want the most usable light you should pick no coating. All these coatings work by reducing the output of the bulb so that just one color is emphasized
Watts
Tells you how much power it needs to run properly. Within a given type of bulb more watts should equal more light. You might want to take a multimeter and see if a full twelve or thirteen volts is actually making it though the wiring harness to the headlight. Sometimes Ford cheaps out on their wiring harnesses, the headlights don't get full power, and you drive around wondering why the headlights seem so dim. The standard answer to this problem (if you have it) is to retrofit your own heavy duty wires to the bulbs so they are not starved for power.
Lumens
This is a critical one. More lumens means more light, and it is a measurement that it is hard for the manufacturer to lie or be misleading about. You will not be able to see small differences by eye.
Life
Means the expected time before failure. Sometimes a company will get more light by driving the filament particularly hard, this tends to give a short life product. Your call on which you value most, lifespan or output.
Color K
Refers to how "warm" or "cool" the color of the light is. The eye sees more than just one color as white and this helps you to know just which white to expect. Unless you have a show car, I wouldn't worry about this.
And as Scheinwerfermann said, aiming them right is important. You can have the brightest light in the world, but if it's all shining down on your bumper it won't help you.
Hope this helps.