Connect all the light bulbs with cables without mutual intersections; the number close to each light bulb indicates how many connections you need to light it. If the aount of connections is excessive, the light bulb will burn: ideally you first do the connections, and after checking they are right, light them simultaneously. You have only 3 chances and a limited amount of time to do it.
Move the mouse over the line separating 2 lighting bulbs to make visibe the cable that connects them; click at the cable to activate it. When you have all connections ready, click 'READY'. To restart, click 'CLEAN'. To exit the game, click 'GIVE UP'.