You should always be sure that whoever is installing a light fixture in your home has the right training, license, and experience to complete the task. Licensing requirements may vary depending on where you live, but many Taskers will have the right qualifications to be able to install your light fixture for you--just let them know exactly what you need!
*Note: Licensing requirements for installing light fixtures and related tasks vary from state to state. Confirm your Tasker has any needed license(s) needed when describing the job.