Originally Posted by
morval
http:///forum/post/2581172
acctually the letters and numbers on fluorescent lighting have nuthing to do with the # of bulbs.
Lamps are typically identified by a code such as F##T##, where F is for fluorescent, the first number indicates the power in watts (or where lamps can be operated at different power levels, the length in inches), the T indicates that the shape of the bulb is tubular, and the last number is the diameter in eighths of an inch (sometimes in millimeters, rounded to the nearest millimeter). Typical diameters are T12 or T38 (11/2" Ø or 38.1 mm Ø) for residential bulbs with old magnetic ballasts, T8 or T26 (1" Ø or 25.4 mm Ø) for commercial energy-saving lamps with electronic ballasts, and T5 or T16 (5/8" Ø or 15.875 mm Ø) for very small lamps which may even operate from a battery powered device.
With refrence to T-5. There is no difference in them from std flourescent, PC, or any other T bulb. Where the difference lies is HO placed before it. This represents High Output, now what has happened is the bulb produces more lumens per watt making it more intense. However, this alone although more intense than std or NO (Normal Output) flourescent lighting isnt as efficient as it should be. Another advantage to using T5 sized lamps when making them HO is that because they are so small in diameter they are capable of having individual reflectors placed over them. Now their intensity is far superior to any NO flourescent light.
I do agree that some species of anemone maybe ok under PC lighting to the OP. I dont believe your application would suit this scenario. If your going to attempt an anemone under PC's your tank depth should be IMO No more than 16" deep, and 12" would be ideal. JMO