Camila has a problem. She wants brighter lights for the outside of her Pet Shop, but if her electricity bill goes any higher it will put her into a higher price bracket which is more than she's willing to pay... how could she get brighter lights without using more electricity? she could tie little mirrors on the puppy collars to reflect more of the light she already has

she could switch to filament light bulbs of a higher wattage

she could replace her old, filament light bulbs with florescent light bulbs

she could screw the light bulbs in tighter