1. The problem statement, all variables and given/known data A flashlight lights up a wall a distance L from the small bulb whose wattage is given by W. The conical beam emerges from the flashlight at an angle theta. What is the intensity of light as it hits the wall a distance L from the bulb? 2. Relevant equations I = Power/Area 3. The attempt at a solution I = W/[area of cone] = W/(pi*Lcos(theta)) I'm having a bit of trouble understanding this problem! Please help!! Thank you!