Looks like you actually need 5 of them. Unless that N/C one is one of those new ones off course. I bought the one that takes 3 AA's and my friend got the one that took 2 AA's. The 3 AA unit produced a much brighter, whiter light. It is still perfectly bright completely across the
auditorium or up in the grid, and best of all, the LED is focusable.
I liked it so much that I bought a second one to keep in my car at all times to replace the D cell one I had in there since it was significantly brighter. I've now also purchased the retrofit made by Maglight to convert my D Cell for outdoors use. Mag doesn't make the retrofit that I've seen yet for the miniMags.