Power Compact Fluorescent Lighting
Various (Custom SeaLife era)
Bent-tube compact fluorescent lamps folded into twin tubes, packing roughly double the output of a straight tube of the same length into hoods for mid-1990s reef and fish tanks.
Why it mattered
Compact fluorescent technology gained popularity around 1990, and aquarium fixtures followed in the mid-1990s. For keepers who could not afford or cool metal halides, power compacts were the first affordable step up from dim normal-output tubes.
The format suited the era's smaller tanks. A folded twin tube delivered usable light over nano and mid-size reefs, kept soft corals and many LPS growing, and roughly doubled bulb life compared with VHO tubes.
Power compacts were a bridge technology. T5HO beat them on output and reflector efficiency, then LED beat both. Bulbs are now scarce enough that surviving fixtures mostly sit in closets and museum shelves like this one.
Key specs
- Twin-tube folded lamps, commonly 55W and 65W
- Daylight and actinic versions, often paired in one hood
- Roughly twice the service life of VHO bulbs
- Built-in reflectors were often simple flat or bent designs
Keeper notes
- Keepers remember PC hoods as the light that made their first soft-coral tanks feel like real reefs.
- The knock was always spread and punch: fine for mushrooms and LPS, marginal for demanding SPS.
- Finding replacement bulbs is now the main reason surviving fixtures get retired.