NO - Normal Output Florecents
- Power Compact Florecents
- Small Polyp Stoney coral --> these require higher intensity light
Large Polyp Stoney coral ---> these overall dont require as much light as SPS
but some types do require intense lighting.
I suspect its a single PC
bulb fixture with a 65W (approx 23" long) 50/50 bulb.
If thats the case you will probably be fine for lower light corals like mushrooms and other soft corals and maybe (depending on the species and location) a few of the LPS
If you want to keep some of the higher light corals then you probably would be good to upgrade but to something more substantal than just 75W. To give you an idea I have two 55/65W bulbs over my 20 high and realisticly I could use more light than that if I had room in the canopy to put another bulb and reflector.