First thing you should do it put a voltmeter to it to find out if its already charged.

If the meter reads 10 - 13v its charged. be VERY carefull handling it - a shorted cap can burn fingers skin etc, take the lightbulb and connect it to the + and minus from the cap. A good 1f cap should power it from 5 to 10 seconds before fading out.

If the meter doesnt show 10-13 or shows something like 5 or 6 after you charged it, then you have a shiny paperweight my friend. If you connect a cap backwards it loses more than half its charge capacity nearly instantly, also shorting caps out will significantly shorten their life as well.

feel free to PM me if you dont understand.