6,500K Vs 10,000K
I recently upgrade my 10,000K 20watt T12s (2 of them) to 6,500K 75watt T12s (2 of them) to convert my 50g FO tank to planted tank. After doing the upgrade, I noticed some increase in tank brightness, but not 4 times as I expected.
Is 6,500K bulb less bright to eyes that 10,000K? Is that the reason why it does not seem much brighter?
Last edited by pk-sd; 03-07-2005 at 08:17 PM.