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To answer you're question Candi. The closest beach to P.M. Is Ideal beach in Middletown. If you remember where Donna lives, It's right across the street, or another one a block from my house.
If your not gonna have any SPS's, there's no need for Halides. If you do decide you want Halides, you would need 2, since the light span for 1 is only 24inches wide. I'm not a fan of clip on lights, afraid of them tipping over and falling into tank. If your looking for an anemonie down the road...
Tropiquarium in Ocean. Has nice stuff. smcooler (Stan) in Hillsbourohas nice corals too.
http://www.reefcentral.com/forums/showthread.php?s=&threadid=1074671
If you're asking how ballast work, Its like the electric in you're house. You have 110- 120 volts, you can run any watt light bulb (60watt- 75watt-100watt) but they have to be 110volts. You also have 220volts in you're house and would need 220watt bulbs which they come in 60watt-100watts. So, if...
Most 20k bulbs do not have a high Par like you're old 14k's. The lower the K # usually means their brighter or more par. Here is some com parason from Sanjays site.
http://www.reeflightinginfo.arvixe.com/