lighting change questions

[Jamie1210]

Hi, so I just changed to another brand of lighting, but it is still the Power compact/Metal Halide type, same wattage, but a 20K bulb, as opposed to the former 10K bulb. My question is, how will my RBTA and corals be affected, if any? I'm assuming that as long as the wattage is the same, they should be fine ...

Thanks in advance
~jamie

 

[bencozzy]

20K have a lower PAR than 10k so your corals will grow slower and the nem might move thinking it was blown deeper on the reef.