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I'm really leary of any LED light that does not have a fan, they get very hot. I had a cheap LED over a nano tank and it got hot enough to burn your hand on it.Interested in this one. Says it is water proof
https://www.amazon.com/dp/B07LCCKLJB?ref=yo_pop_ma_swf&th=1
I'm really leary of any LED light that does not have a fan, they get very hot. I had a cheap LED over a nano tank and it got hot enough to burn your hand on it.
True but I think the trend based on research is more red. Having said that, I don't know and that's why I'm asking lol. Where is @saltyfilmfolks and @Dana Riddle when you need em?
Here's an absorption spectrum with the approximate pigment composition of some of my Chaeto (growing under "daylight" LED)
I can't generate an action spectrum, but I can very roughly compare the fluorescent response from the chaeto to a few different LEDs, at approximately the same brightness.
from Biggest Response to Least:
Biggest
449nm
457nm
400nm
500nm
635nm (only red available)
520nm
Least
(I dunno why I didn't record my 430nm LED, but I guess I forgot.)
@Dana Riddle I wonder if the ostreobium growing under all that coral tissue has developed ways to be more sensitive to Red light.
Oops! I forgot "absorption" and "absorbance" mean different things here. This is data based on the spectrophotometer - should have stated "absorbance".I see your chart says absorption - wouldn't absorbance be a better way? Another question - how long was the Chaeto exposed to the various LEDs' light?
Re: Ostreobium adapted to red light. I'd have to dig through my notes, but I looked at absorbance (or was it reflectance) of light by a Porites coral skeleton. Thinking out loud - I think it was absorbance - the skeleton absorbed blue light...
If you can, provide enough flow to tumble the Chaeto. That should minimize the stagnant Boundary Layer as well as ensure the entire plant is reasonably illuminated.Hi All
Thank you for all your valuable input as this thread has been extremely helpful in informing me of how best to light my new refugium for my 100g tank as I've been wanting to move from carbon dosing to a more natural and biologically friendly method.... I have just set up a separate refugium section (11.5x11.5x16 inches) that will be fed water via a pipe from my manifold before it trickles into my return section. I've mounted a ufo grow light (150w) 7 inches above the water line - could someone please clarify for me (based on my dimensions) at what rate the water needs to flow out of the refugium ie. maximum and minimum so that it's not too much thereby causing my chaeto to be ineffective but also not too little for it to become stagnant? My chaeto is arriving tomorrow.... Thanks.
Thanks Dana!If you can, provide enough flow to tumble the Chaeto. That should minimize the stagnant Boundary Layer as well as ensure the entire plant is reasonably illuminated.