I have an undersink pump for a basement bar sink. Can I put light sconces on this circuit?

Just wondering what products people use to retrofit electrical outlets (metal - conduit) I have used this product a coupe of tiems: [url]https://www.amazon.com/Hubbell-Raco-506-2-Inch-Gangable-Knockouts/dp/B000BQMERA[/url] Not bad, but not 100% happy. Good for no stud situations, but requires a rather large cutout, especially around the clamp screws. Also, while box has knockouts ll around. Effectively can only used on rear. Other option is Madison clip: [url]https://www.grainger.com/product/RACO-Galvanized-Steel-Switch-Box-30EJ95[/url] Never used it. Also used regular box when stud was an option. Screw from inside the box into stud. A bit fidly to get screw in. Ends up being at an angle.