I currently have a 20 long I've been planning on converting to a planted tank with schooling fish. I've been reading here that it's a good idea to consider this as a low light tank. I need to get lighting and I was considering either a twin-tube 20 watt fluorescent or a 55 watt compact fluorescent, both the All-Glass versions. I am considering throwing some high light/low height plants sometime, like glosso and just wondered if the twin 20 watters are enought for that type of tank and high light requirements? Or should I go the distance with a compact?
If a compact fluorescent, then I notice that the 30" strip that is suggested has actually around a 24" long tube with unused space on the ends - should I save some cash and buy the 24" version instead, since the tubes appear to be the same? Thanks for any thoughts.