A lamp or light fitting will light up if connected to either Alternating Current (AC), or Direct Current (DC). AC is from the mains, and DC is from a battery. So it depends on the construction and components used to construct the lamp as to which electrical source you use.
mains plug
mains plug
mains plug
To make a lamp or light fitting light up, you typically use a light bulb or LED bulb. The electricity flows through the bulb's filament or semiconductor, causing it to emit light. This process is controlled by a switch that completes the electrical circuit when turned on.
Yes, you can use an energy saving light bulb in a fitting with a dusk to dawn sensor. Energy saving bulbs are compatible with most types of light fixtures, including those with sensors. Just make sure the bulb is suitable for outdoor use if the fitting is located outside.
Connect it from the battery to a switch running through a 10 amp fuse.
About 1/2 amp.
yes as long as the sockets match up and it is not a high output light fixture
Wire nuts
use an amp to make it loud
Usually the lights for instrument illumination is 4 amps. But some models may vary by design. So, to make sure, locate the fuse box and look for the fuse for the dash and use the same amp as the one that is currently plugged there if replacement is needed.
Sure you can, cordless phones use very little energy, much less than whatever type of light bulb.