Chapter 2, Problem 2.31P

A modeler wants to light his model building using miniature grain-of-wheat light bulbs connected in parallel as shown in Figure P2-31. He uses two $1.5\text{V}$ “C-cells” to power his lights. He wants to use as many lights as possible but wants to limit his current drain to $500\text{μA}$ to preserve the batteries. If each light has a resistance of $50\text{kΩ,}$ how many lights can he install and still be under his current limit?