2 X65 w of PC is bright, but still not anywhere near too bright. You could put a 250W MH lamp over a 40 litre tank as long as you gave the corals inside enough time to acclimate.
Yes, you can glue corals. Ordinary gel superglue (cyanoacrilate) works fine, or any marine epoxy. The superglue will dissolve eventually, so should only be used on corals that will encrust over it. Epoxy is a bit harder to make stick, but works well for things like
branching frogspawn or torches.
You can't really glue
soft corals, because they get slimy and the glue wont stick. For those, people tie the coral in some way to a rock until they attach.