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light penetration

  1. General Reef Discussion
    effective water penetration power of bulbs and tubes : Fluorescents(FL) - down to 12" CF like PL-L, T4 and T5 - to 15" MH 70W to 16" MH 150W to 20" MH 250W to 24" MH 400W to 30" also "MH light is a point-source light, ALL the intensity is concentrated at one point and this is why it can...
  2. The THINK Tank
    Just saw the thread on corals and if they needed UV light. My question here is what makes blue light penetrate the water so well? Is it something to do with the frequency of wave it is on? Is it something about salt water in particular? I've never seen a FW tank under blue light but I've also...
  3. Lighting
    OK, this is all theoretical since I don't have immediate plans to move forward. I am wanting to build a hood that will match my stand and change lighting. My original plans were for a 150w MH with 2 VHO actinics. I want keep the option open of switching the 40br to a 65. If I was running...
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