Quote:
Originally Posted by jus68
Stones,
Would you please tell us the T5 bulbs combination you have for your setup and what make?
Thanks,
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I'm currently using: 4 Aquascience Blue (22K) bulbs, 1 KZ Fiji Purple, 2 KZ New Gen Coral Light (14K), and 1 Aquascience Special (15K, but looks like a 10K). In reality, my tank actually looks quite a bit bluer than the picture as the white balance on my camera is impossible to get set correctly.
Next bulb change I'd like to try all ATI bulbs since progressive reef now carries them as the pro colour is more subtle than the fiji purple. I'm not a huge fan of the Aquascience Special (15K) either and next time I'd swap it out for another KZ New gen or an Aquascience Duo (17.5K) if I choose not to go all ATI.
Regarding the par tests done on RC, I can't find the thread but I seem to remember the T5 unit being a TEK while the metal halide was a 2 x 250 retro with lumenarc type reflectors. Neither of the setups were being overdriven and the PAR readings were very close which only proves that T5s can produce the same or similar light intensity to metal halide.
If you were to compare apples to apples and make the comparison more fair, you would have to pair up an ATI powermodule or Sfiligoi Stealth against a high end metal halide fixture like Sfiligoi or Giesmann. That being said, both setups used in the test were choosen because they were readily available for purchase and represented the most commonly employed fixtures used for either metal halide or T5s. I'm sure higher PAR levels could have been achieved had they used higher end fixtures but even then PAR readings would likely have been similar as adding active cooling to T5's makes a huge difference while using a better reflector/bulb combo for metal halides also makes a huge difference.