Questions on 400watt. HQI Set up............

[Ritteri&Bubbles]

I dunno still, its still unclear if the 250 watt DE 10k bulb is superior in PPFD to the 150 watt version. After looking over 3 articles in the past by Sanjay, its not clearcut at all. The 150 DE gets a 246 with shield and reflector, the 250 DE scores around 100 without shield and reflector if I am correct. And the shield will only drop the figure a bit, so the missing link is what does the reflector add in value realisitically?

 

[SPC]

Ah, please see this link for tests just run:
http://www.reefcentral.com/vbulletin/sh ... adid=93807
Steve

 

[sanjay]

I dunno still, its still unclear if the 250 watt DE 10k bulb is superior in PPFD to the 150 watt version. After looking over 3 articles in the past by Sanjay, its not clearcut at all. The 150 DE gets a 246 with shield and reflector, the 250 DE scores around 100 without shield and reflector if I am correct. And the shield will only drop the figure a bit, so the missing link is what does the reflector add in value realisitically?

I am still not sure what you are unclear about. A 250W lamp of the same color temp as the 150W lamp will put out more PPFD than the 150W lamp, ignoring all other external effects like reflectors, poor ballast etc.

Like I said before, I am going to start a serious test of all reflectors starting in July. So if you have any one willing to send me reflectors and lamps please contact me. Also, I will run some more tests on lamps.

As for testing multiple lamps, once again if I can get the lamps I will test them. I have spent enough out of my own pocket already and am not going to spend more on getting multiple copies of lamps that I am not going to use.

As usual I will be very happy to share the information, as I have no vested or commercial interests.

sanjay.

 

[SPC]

Any comments about this test?
Steve