Sort of. I guess I was thinking about the stygian depths of the oceans. Is it the plankton soaking up all the light, or is the "negligible" absorption of the water because there's only a couple hundred gallons in a tank, vs the scary-huge amounts of water in lakes and oceans.
RE: DIY - Designing Optimum Wavelength LED Lighting to Turbo-Boost Plant Growth (or Inhibit It)