White Text On A Light/ Variable Background

Hello All,
This may seem like a first day at school question, but it’s always been something I’ve wanted to do correctly.

I’m designing a few promotional cards for a local museum. I intend to make 4 designs using a variety of photographic backgrounds. I really want to use some photograph that are light to dark with text overlaid. I’ve mostly tried to stay away from this for legibility reasons, but have used drop shadow in the past.

I have attached a PNG for one of the designs, do you think it’s unreadable? Is there a better way to improve it?

I’m using Illustrator CS…

Thanks for listening

Capt,