Are all T5 bulbs GREEN?

[Miami Reef]

I’m having a weird situation. The right side of my tank has new white rocks and I did 100% blue plus. I tried mixing purple plus and actinic but it looks GREEN. Is it because the white rocks are reflecting? This didn’t happen in the other side of the tank.

I’m in using an orange filter. Left side is Ai hydras LED. right side is a mix of blue plus, actinics, and one purple plus

 

[Miami Reef]

Nevermind. I added more purple plus and the problem went away

 

[ADAM]

The newer rocks probably have a thin micro algae layer growing and while the white base color is still easily seen it makes the green hue look brighter.

 

[Tamberav]

The issue is the new rocks. Even when only my blue+ is on... I don't have that problem with established rock.

 

[Miami Reef]

Thank you. I was going crazy because I had the same bulb combo on the left side and it looked so good.

 

[oreo54]

I’m having a weird situation. The right side of my tank has new white rocks and I did 100% blue plus. I tried mixing purple plus and actinic but it looks GREEN. Is it because the white rocks are reflecting? This didn’t happen in the other side of the tank.

I’m in using an orange filter. Left side is Ai hydras LED. right side is a mix of blue plus, actinics, and one purple plus

One other factor to consider . Mercury based lights have a large green emission spike.
See old school badly salted "daylight" tubes.
LED whites use (many) a yellow phosphor so will look yellow in said " daylight" Kelvins.

So sometimes lot of green light to reflect off white or lot of green light to reflect off green stuff like algae.

Assuming you are running the Hydras short in both white and green there is a reflective difference regardless of the cause .

Adding your purple tube will help overpower any green reflectance. Your white rock will now be purple-ish or whatever the new dominant wavelength(s) is. Balanced rgb is white.


I assume much of the green is down converted to yellow to red in the "purple" tube.

See bottom:

https://media.sciencephoto.com/image/c0177260/800wm/C0177260-H-He-Hg_emission_spectra.jpg

As to your question..they all sort of start that way...then modified w/ phosphors.

More than most care to know.