1995 Ford Ranger help with front lights

You cannot "open" your headlight housing. It is sealed, you can only remove the headlightbulb from the rear of the headlight housing.
You can replace your headlight housing with aftermarket. LMCtruck. Com has Euro lighting for the Ranger, But you are looking around $300.00. As far as upgrading your bulb's. I've been very happy with Xenon bulb's. Xenon headlight bulb's put out up to 30% more light while retaining street legal 65/55 watts. Xenon bulb's can be picked up at your local auto parts store, and I do believe they also offer the "blue" light that you are looking for.