What is this?These lamp sockets work with E10 bulbs. Great for the equipment on the electrical experiment lab, old flashlight repairing, indicator light or warning light on the distribution box, control panel.What will I get?Are there any advantages of the product?Nickel-plated copper socket and iron wire, with long service life.How to use it?Screw the bulb in the lamp socket and connect the wire leads to the power source.What should I notice?Please note that the red wire is positive and the green wire is negative.