How-to-install-bathroom-wall-light-fixture, this 1980s light fixture was making this bathroom look very dated. replacing it is not hard. before you start the job, be sure to take these safety precautions: switch off and tape off (or lock out) the breaker to any circuit being worked (turning off the wall switch is not enough as someone could inadvertently switch it back).. Installing a bathroom light fixture involves electrical work; however, it is not very difficult. the average do-it-yourselfer can remove an old fixture and install a new one in a few hours., among the most popular upgrades to any bathroom is the installation of a new spa or whirlpool tub.in fact, according to the national kitchen and bath association, about 25% of bathroom remodels now include a spa or whirlpool tub.