There are a couple of ways you can use lights.
9v led light kit.
So you now you can easily afford to light up a model kit throw a battery and a few led lights in it and you re good to go.
Prewired led diode 5mm 12v white 7 87 inch led lamp light bulb emitting diodes metal 5mm led clip holder panel mount 9v battery holder clip snap on connector cable lead by ltvystore white 4 5 out of 5 stars 67.
A 9v is common because of it s small size and it can put out the power needed to run several lights.