S. Hieber wrote:
If your CFs are the spiral type then a decent MH bulb willAh, I see. I'm using the straight twin tube CFs. I've also adjusted the timing so they're off during the heat of the day--naptime!!--but anything that reduces the load on the house a/c is welcome. I'd also thought of using those Suntube or Solartube ceiling installations, but I figure that probably wouldn't get down into my deep tank very well. Better to use a cable feeding directly into some diffuser sysem right above the tank, I think.
give off less heat and more light than a comparable wattage
CF -- the MH's are more energy efficient, not less. The
temperature very near the bulb can be higher but
temperature and heat are two diff things. A lit match is
very hot near the flame but gives off relatively little
heat. MHs have roughly the same effective energy efficiency
as the linear (twin-tube) CFs (or PCs) and T5HOs.
I don't think anyone said sunlight is bad; folks have just cautioned about getting too much of a good thing. Direct sunlight is so much brighter than the electrically generated light that most folks can get into an aquarium, it can be a whole diff ballgame. In fact, a ballgame is a good example. All those electric lights for a nightgame don't put as much light onthe filed as the noonday sun. If direcdt sunlight is used as a supplement to electrical lighting, the effects can be very strong.
Indirect lighting, for example, through a north-facing window in a northern temperate zone -- or through some optic fiber -- can be substantially less powerful than direct sunlight.
Fire is a good thing, you just have to use it wisely ;-)
fire+water, no less!!
Well vented hoods and possibly a room fan can be a simpler
way to move light-bulb heat away from an aquarium. But at
high ambient temps, the challenge, as you point out, is
Plus getting that energy down into a tall deep corner tank!
Let us know if you run any light pipes and how it worksI understand that LEDs would be cooler, more efficient & durable than either MH or CFs, which makes them less toxic than lots of replacement bulbs, but of course you're still putting in electrical energy. I'm only seeing very tiny ones, such as hoods with moonlight bulbs.
out. It sounds better than doing a DIY array of LEDs.
Thanks so much for your help!! Heather
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