I have a huge concern about the dragonet as well. Contrary to their often used name, Manderine Gobies are not Gobies at all. Their Dragonets and very difficult to care for. I have 1 in my 110 gal
with 30 gal
sump, and I am getting concerned because he looks very thin. They are netoriously picky eaters and normally don't eat preparred or frozen foods. A 30 gal
is a death sentance I believe. But I think the school of chromis are fine. I have 3 and they are a schooling fish, but I have normally heard 'odd numbers'. I think your 5 should be OK.
I was also concerned about the lights at first, as noneof the normal lighting manufacturers for aquarium hoods had gone LED
yet. However, that Coralife unit looks like it should work (unlike Marineland's Reef unit which is just plain useless). the Coralife one has 300W of LEDs that are mostly white and actinic and hopefully 5W bulbs driven to 3.4W. It should work for a 4' tank. Be carefull tho, it could burn stuff.
If those lights are what they look like, the anemone should be fine in there, but I would start with corals. Anemones need stable mature tanks, and all our experts suggest you wait a year.
You can't stock a saltwater tank like a freshwater one, and I would tweak it a bit. Loose 2 chromis and add perhaps a blenny to eat algae.