This is a very power efficient light bulb.It just uses nine volts and a few leads!
Step 1: Material Needed:-
1)9 volt battery
2)a few leads
5) a beaker or container.
Step 2: Structure:-
1)Take the crocodile clips and attach the wire to it.
2)Keep tye clip upright and then keep the lead on it.
3)Attach a switch to the wire complete the curcuit with the battery.
Step 3: Thats All!
Now if you need any emergency light use it!