What is the best way to charge solar powered garden lanterns quickly?

[Shirleyion]

I have a set of solar powered garden lanterns I need to use for a play. The man at the store said to leave them in full sun (I'm in England, so that's never going to happen!) for three days before turning them on. However, I need them before that for rehearsals. Is there a way to quickly and artificially charge solar cells? What sort of artificial light works/works best in charging solar cells?

[okmqaz42]

For the most part any artificial light source will begin to charge your lamps but it will be very slow because compared even to overcast sunlight an artificial light sorce is has a very low energy output. If you are stuck put them as close as you can to a lamp, the higher output the better, something like a floor light in this case would be best.

[fotoguy]

Mine use AA rechargeable batteries. Could you put them in a charger just like any other rechargeable?