If you want an LED that replicates MH, keep your eye on Luxdium. He's developing a replacement puck for the Prime HD and Hydra 26HD/52HD that mimics a MH closer than anyone has attempted to get yet. It's impressive.
As for the Quanta Pro bars, I'm completely sold on them. Yes, they are built by the same Chinese manufacturer that builds all the others, but Luca has really dialed in the spectrum and spread/blending better than anyone else has in an LED bar (and the manufacturer will only build them like that for him, nobody else). My ONLY, and I mean ONLY nitpick is that there is no ability to control or dim them. I'm an LPS and softie guy, so I don't need a ton of PAR, but I do need spectrum and spread. If I could put multiple bars on a tank and them turn them down to what I need, I would jump in with both feet yesterday.
Did someone say luxdium? (just joined R2R)
@Hooz may have provided a brief intro, but what I'm working on is a plug and play LED upgrade system (known as LUX Engine) for AquaIllumination lights (13/26/52/HD) that seamlessly integrates with their optics and electronics to produce a brand new light that can exceed the spectral performance of many lights that are currently on the market, while still retaining the customizability and controllability that smart lights are known for.
Traditionally, LED manufacturers have been trying to emulate lights of the past, such as Metal halides or T5HOs, or even mimicking each other. However, where we differ is we take a research-first approach to lighting. We're not explicitly concerned about mimicking any particular spectrum, but more-so about questioning the status quo and maybe setting new standards along the way. This philosophy is what guides us to help write the next chapter for LEDs.
If an "ideal" spectrum exists, then it should:
-Target Major Photosynthetic Pigments
-Excite All Fluorescent Pigments
-Be Tunable to Visual Preferences
We've been on this quest since March 2019. So far, we've come close, with advanced spectral recipes, custom-binned chips (super hard with a chip shortage), and an improved thermal substrate that allows our LEDs to run cooler.
In addition to data, we also value results. Since June 2020, I've shipped beta-versions of these pucks worldwide for people to install and provide feedback. Given the variety of install options (these can support lights made as far back as 2013), tank conditions, and user preferences, having a large dataset was instrumental in developing and refining the layout.
With the beta over, we can release the final pucks for everyone once our website is up and provide more data.
For now, I attach some of our beta spectra along with some other spectra for reference and our PAR testing rig.
I could go on and on about this and some of our research, but I don't want to hijack this thread.
If you want to see more data and analysis on lighting spectra, we have an Instagram (IG handle:
@luxdium) where we publish some of ours and some we crowdsource from others.