What happens if a light-bulb in the socket is of a lower wattage (or higher wattage) than the one the socket specifies for?
The socket does not specify a wattage. The watt rating on a socket is the maximum wattage (based on using an incandescent bulb) that can be used without overheating and potentially causing damage or even a fire.So a socket rated at 60W may have a 60W or lower incandescent bulb in it. However, this is rated at the actual power, not equivalent light. So you might get away with putting a CFL or LED bulb in that is higher than 60W equivalent in light output, as long as the actual power is 60W or less.However, this is important: Many CFLs and LED bulbs are not meant to be used this way. The base gets hot, the electronics get hot, and heat is the enemy of electronics. So if a light fixture or socket is rated at 60W max incandescent. I would stick with CFLs and LEDs with equivalent light output of a 60W incandescent.Read the box - many CFLs and LED bulbs are NOT rated to go into enclosed fixtures like recessed ceiling lighting, or they may overheat. Most of the first run of CFL bulbs weren’t even supposed to be used upside down!
Solar cells - more important voltage or current?
To quick charge your cell phone,it requires 5 volts at 800mA output. Therefore, the solar cell must able to provide 5 volts or not more than 5.5 volt. Current output can be varied any value under 800mA,but the charging time needs much longer. Example: if you have a solar cell rated 5 volts at 80mA output under full sun, and your cell phone normal fully charging time with charger is 15 minutes. By using this solar cell to charge it,requires 15mins X 10 = 150mins.