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Old 06/01/2020, 02:54 AM   #1
Kaiser699a
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LUX measurement at water surface useful?

I am hitting a peak of 20000 lux at my water surface for 4 hours in the middle of my lighting schedule. I run Evergrow LED fixture (Reefbreeder in the US I believe). Tank is 24" deep and LED fixture is 10" above the water surface. I keep softies and LPS. Is this value any use to tell me if my lights are high enough output or if I need to increase or decrease intensity?


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180g (US) DT with 30g (US) sump. Softies and LPS. Red Fire Fish, Royal Gramma, 2x Ocellaris Clowns, 2 Spot Tang, 4x Green Chromis, Lyretail Anthias, One Spot Foxface, 2x Azure Damsels, Green Clown Gob
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Old 06/01/2020, 10:32 AM   #2
Vinny Kreyling
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Not really, A PAR meter is the tool to use.


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250 gallon mixed reef, 2 Reefbreeder's Photon V 2, RD 3 Speedy 80 Watt, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.
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Old 06/09/2020, 04:11 AM   #3
Kaiser699a
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That's cool and I know that PAR is best but I don't have PAR meter


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180g (US) DT with 30g (US) sump. Softies and LPS. Red Fire Fish, Royal Gramma, 2x Ocellaris Clowns, 2 Spot Tang, 4x Green Chromis, Lyretail Anthias, One Spot Foxface, 2x Azure Damsels, Green Clown Gob
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Old 06/12/2020, 02:57 AM   #4
Kaiser699a
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I turned my LEDs down and most corals are responding better than before. Maybe they are expanding more to capture more of the lower intensity light now. I will leave them turned down for a few weeks to see how zoa and mushroom growth gets on. I also reduced whites more than the blues. It's a bit of a guessing game to be honest...


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180g (US) DT with 30g (US) sump. Softies and LPS. Red Fire Fish, Royal Gramma, 2x Ocellaris Clowns, 2 Spot Tang, 4x Green Chromis, Lyretail Anthias, One Spot Foxface, 2x Azure Damsels, Green Clown Gob
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Old 06/12/2020, 08:52 AM   #5
Vinny Kreyling
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BRS rents them out.


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250 gallon mixed reef, 2 Reefbreeder's Photon V 2, RD 3 Speedy 80 Watt, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.
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Old 06/12/2020, 12:27 PM   #6
Kaiser699a
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Not really practical because I'm in Northern Ireland


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180g (US) DT with 30g (US) sump. Softies and LPS. Red Fire Fish, Royal Gramma, 2x Ocellaris Clowns, 2 Spot Tang, 4x Green Chromis, Lyretail Anthias, One Spot Foxface, 2x Azure Damsels, Green Clown Gob
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