I have a coralife 48" light that just recently had a bulb die. I bought this unit used and therefore have no manual to rely on. Is there anyone out there who can help me know what to do to loosen this crazy bulb. My husband has even tried to pull it out and we just cannot figure it out. I don't know if there is a trick to it or if these bulbs are just really stuck! We've tried to pull the others out just to see if something was funny about the dead one, but those won't give up either! They are the square pin bulbs....please help! 