Your SPS full spectrum vs blue only par?

[beesnreefs]

Yes but @jda will also tell you about how metal halides fill in a lot more of the gaps in spectrum that LEDs miss.

Metal halide is more like the sun in that you can push higher PAR and not damage your coral. I believe the sun measures close to 2000 PAR in most shallow tropical seas. I’d imagine it’s even higher in the Red Sea.

I get they aren’t the same as halides, but don’t the “white” LEDs fill in a lot of the “missed” spectrum?

 

[vitaliyphoto]

What is “LED lights spectrum”? You could have a blue LED that only covers a narrow region of the visual spectrum of light.

Exactly, If you think black box fixtures that only have white and 450nm blue LEDs the output they provide in 450nm at 350 par can easily outmatch radium bulb’s 450nm par

 

[oreo54]

I get they aren’t the same as halides, but don’t the “white” LEDs fill in a lot of the “missed” spectrum?

The "missed" spectrum they are usually talking about is not in the visible range.
This is likely a more plant centric MH but the "non-visible part is probably similar.

And..
https://www.reef2reef.com/threads/w...ctrum-whats-the-secret-spectral-sauce.968900/
The amount of UV (A, B and C) depends on the bulb design and shielding.

https://zeiss-campus.magnet.fsu.edu/articles/lightsources/metalhalide.html

Please note , none of the above are "aquarium' metal halide spectrum. just more of the potential and "outlier" frequencies they are capable of.

I suppose I should include one. Most graphs usually just show th visible spectrum.
This one has a somewhat wider range.