[BOTIA]

Question how often do you replace your led lights?
I have a 12 gallon bookshelf tank running co2 and and jc&p 33-45 strip light on it at 9000 (3yrs) hours now. It used to grow my red plants really well. Not anymore. I am still fertilizing same , water same , co2 same....

 

[jeffkrol]

Question how often do you replace your led lights?
I have a 12 gallon bookshelf tank running co2 and and jc&p 33-45 strip light on it at 9000 (3yrs) hours now. It used to grow my red plants really well. Not anymore. I am still fertilizing same , water same , co2 same....

Without "before" measurements it is hard to tell.
But first question did you dim them?

JC&P 33"-45" Full Spectrum Aquarium Light

Products Feature✔️Light Fixture: 33” Long and 3.5" Wide (85x9 cm), Light fixture with extendable bracket up to 45”L x 3.5" W (114x9 cm)✔️6000 Lumens at 12” high // 43 Watts // 18 White, 12 Blue, 12 Red, 6 Green LEDs 3000 Lumens at 20"✔️Fits Aquarium from 33” - 45” long // Fits Aquarium Size...

aquaticmotiv.com

Poorly designed fixtures could have suffered output losses.

9000 hrs would be very short to have significant light loss.

 

[somewhatshocked]

And are you sure it's the LEDs themselves and not another component within the fixture?

I've had LEDs last nearly 40,000 hours on even the cheapest "BeamsWork" fixtures from fleabay and some early Marineland units (one over my 12gal long, coincidentally.) But have had to replace other components on both brands multiple times - along with parts replacements for fancier systems from companies like ADA and AI.

Have you tried taking it apart to see if anything's wonky? Or tried a different/newer power supply?

May even be worth reaching out to the manufacturer to ask if there are any known issues with those units. They may have insights that could help you pinpoint the problem you're experiencing.

 

[BOTIA]

Without "before" measurements it is hard to tell.
But first question did you dim them?

JC&P 33"-45" Full Spectrum Aquarium Light

Products Feature✔️Light Fixture: 33” Long and 3.5" Wide (85x9 cm), Light fixture with extendable bracket up to 45”L x 3.5" W (114x9 cm)✔️6000 Lumens at 12” high // 43 Watts // 18 White, 12 Blue, 12 Red, 6 Green LEDs 3000 Lumens at 20"✔️Fits Aquarium from 33” - 45” long // Fits Aquarium Size...

aquaticmotiv.com

Poorly designed fixtures could have suffered output losses.

9000 hrs would be very short to have significant light loss.

That is the light strip 'm using . This is the first version of this light.

JC&P Full Spectrum Aquarium LED Light with Extendable Brackets with Red, Green, Blue and White LEDs Aquatic Fish Tank Light with Dimming Timer, Color Modes and Control 42W(33"-41") : Amazon.ca: Pet Supplies

Find thousands of pet supplies at low prices. Shop online for dog, cat, fish, bird, and small animal supplies at Amazon.ca

www.amazon.ca

Not dimmed . I have an inline wattmeter it is using 28watts right now.

 

[jeffkrol]

Lights listed at 43 watts.
28 seems more out of spec even considering
any wishful thinking...

Power supply may have issues. 3 years is about the time cheap power supplies die.
If 12v find a 4a or better switching ps
If 24v find a 2a or better switching ps

Recheck wattage.