Great suggestions, bfeuerstack
! I like the wall saving idea for the word wall.
Another way you might think about keeping your ICharts is to write them on chart paper in a tablet and hang the chart on a stand. This will allow you to get to them easily, but they're not on the wall.
As far as lights go, can you turn part of your classroom lights off so the lighting is "softer". Kids can use flashlights of different sizes to read by (a good parent request at the beginning of school).