1. The problem statement, all variables and given/known data I need to draw a simple electric drawing that will in reality present a circuit with two 500W floodlights connected in such a way that if the primary light dies out, the relay will connect the secondary light to the source. Only the primary light is supplied, while the secondary light is on the stand-by, waiting to be connected by the relay contactor in case of primary light dying out. 3. The attempt at a solution I was thinking about connecting an auxiliary relay in series with the primary light, and the relay's normal closed contactor in series with the secondary light. In case primary light dies out the relay looses it's supply, closing it's normal closed contactor on the other light. But since the current drawn from 500W floodlight is too strong for the auxiliary relay it seems I can't connect it in this way. I'm sorry but I'm writing this post from a satellite Internet connection from high seas so it's impossible for me to upload a drawing. Can you PLEASE post a drawing of the solution? If there is no way in creating such a circuit with relays only, can you please draw and explain which other elements the circuit would need. Thank you very much.