Final answer:
Grace paid less per light than Travis.
Step-by-step explanation:
To determine who paid less per light, we need to find the cost per light for both Grace and Travis.
For Grace, she paid $54.40 for 8 lights, so the cost per light is $54.40 / 8 = $6.80.
For Travis, he paid $40.25 for 5 lights, so the cost per light is $40.25 / 5 = $8.05.
Therefore, Grace paid less per light than Travis.