I have been asked to photograph a dinner event, which will be held in a poorly lit solarium at night. What lenses would you recommend for this? I currently only have a Canon 18-200 f3.5, but I'm looking to expand my collection. I can purchase an inexpensive lens before the event, or try out and rent one that's currently outside of my budget. Should I bother with a speedlite? I'm not sure if it would look good in a solarium, where the light will be bouncing off glass.