best way to install a heavy vanity light
I am installing a new vanity light. It has three bulbs. It is pretty heavy, about 6.5lb without bulb. I am afraid it is too heavy for a plastic electric box. I want to minimize the drywall damage. Right now I am thinking of three options:
1) mount the light onto the stud, dig a small hole in the drywall near the stud, and connect the wires inside the compartment of the light.
2) use the adjustable all-metal electric box: MB120ADJ
It has a metal tab and can be mounted at the stud. It think it is pretty strong
3) mount the light onto the stud, and install a old work plastic electric box nearby for wire connection. The electric box can be covered by the light compartment.
Which is the best solution?