roktsintst
New member
what pair are you referring to Lawrence?
DSPS tank from Thailand (1000 gallon+)
- Thread starter JohnL
- Start date
mr.wilson
.Registered Member
The basic rule of thumb is to have at least 200 PAR on the substrate. SPS will do well in the top 2/3 of the tank and LPS & soft corals will dominate the lower 1/3. Tanks that are deeper than 3' (1 metre) will have very high PAR for the first 12" but by the time the light reaches the reef structure it will be reduced to a safe intensity.
LED fixtures with focused optics (lower than 90˚) may cause corals to burn. Some LED manufacturers use optics as narrow as 40˚ in order to score high in PAR tests. The trade off of narrow optics is spotlighting, poor coverage, and burnt corals. Raising the light will spread the light better, but at the cost of PAR.
The LED fixtures over Peter's tank have 90˚ optics. They also offer 120˚ lenses for tanks that are 24" or shorter. You really need to look at spectral graphs, CRI and colour temperature in order to establish the PUR (photosynthetically usable radiation) value. PAR is less important as it is only a measurement of photosynthetically available radiation.
You can se some pics of the new lighting here.
http://www.reefcentral.com/forums/showthread.php?t=1811725&page=266
I really like the Gramma Dejongi. We are lucky in Canada, we can legally import them, unlike the USA. The only way they can own one is if it was captive bred outside of Cuba. maybe I should start a breeding program
LED fixtures with focused optics (lower than 90˚) may cause corals to burn. Some LED manufacturers use optics as narrow as 40˚ in order to score high in PAR tests. The trade off of narrow optics is spotlighting, poor coverage, and burnt corals. Raising the light will spread the light better, but at the cost of PAR.
The LED fixtures over Peter's tank have 90˚ optics. They also offer 120˚ lenses for tanks that are 24" or shorter. You really need to look at spectral graphs, CRI and colour temperature in order to establish the PUR (photosynthetically usable radiation) value. PAR is less important as it is only a measurement of photosynthetically available radiation.
You can se some pics of the new lighting here.
http://www.reefcentral.com/forums/showthread.php?t=1811725&page=266
I really like the Gramma Dejongi. We are lucky in Canada, we can legally import them, unlike the USA. The only way they can own one is if it was captive bred outside of Cuba. maybe I should start a breeding program
bullitr
broke but happy
roktsintst
New member
That is what I suspected you were refering to!
chingchai
Premium Member
chingchai
Premium Member
The basic rule of thumb is to have at least 200 PAR on the substrate. SPS will do well in the top 2/3 of the tank and LPS & soft corals will dominate the lower 1/3. Tanks that are deeper than 3' (1 metre) will have very high PAR for the first 12" but by the time the light reaches the reef structure it will be reduced to a safe intensity.
LED fixtures with focused optics (lower than 90˚) may cause corals to burn. Some LED manufacturers use optics as narrow as 40˚ in order to score high in PAR tests. The trade off of narrow optics is spotlighting, poor coverage, and burnt corals. Raising the light will spread the light better, but at the cost of PAR.
The LED fixtures over Peter's tank have 90˚ optics. They also offer 120˚ lenses for tanks that are 24" or shorter. You really need to look at spectral graphs, CRI and colour temperature in order to establish the PUR (photosynthetically usable radiation) value. PAR is less important as it is only a measurement of photosynthetically available radiation.
You can se some pics of the new lighting here.
http://www.reefcentral.com/forums/showthread.php?t=1811725&page=266
I really like the Gramma Dejongi. We are lucky in Canada, we can legally import them, unlike the USA. The only way they can own one is if it was captive bred outside of Cuba. maybe I should start a breeding program
Shawn. Thank you for your information and link.
Breeding program, that is a very good idea.
I look forward to buying from you.:beer:
HomeSlizzice
Angelfish/Wrasse Nut!
Ching I haven't been on RC in a while, I just checked back and your tank is still looking healthy and beautiful! I like the 14K halides better too, all the colors seem to pop more with a more natural feel. Your growing fish list is incredible. So many gorgeous fish it's amazing. That Gramma Dejongi is a sweet little fish. I wish the US would let us get imports from Cuba. I've had the common Royal Gramma (Gramma Loreto), and he was a great little fish with a good personality and color. The Dejongi is probably gonna be very similar. Again like always Ching, your tank, corals, and fish all look amazing. :thumbsup:
Sincerely,
David D.
Sincerely,
David D.
