Check these out.
www.archersflame.com. They are much better than lumenoks, IMO, and are a lot brighter. They aren't as easy to install, but they sure aren't hard either. Just one more very small step involved. I've shot both, and I don't shoot lumenoks anymore. Junk, IMHO. They break, don't light up, fall out, and just aren't very durable.