Originally Posted by Plowboy91
I thought there were more factors than just going by the WPG
rule. If not then what lighting do you reccommend? Power compact w/ straightpin bulbs? I would rather not go to MH
bulbs. It also poses the issue that I have 2-36" triple tube with 4 tropic sun bulbs and 2 reef sun bulbs that are practically brand new that i can't use.
There are correction factors and such based on the type of bulb, as well as the tank dimensions (actual lumens hitting the plants), but unless dealing with a massive tank (or massively tall) or a nano tank the wpg
rule is a pretty good starting point.
And as rkilling1 mentioned you have a very low light level right now. I would recommend at the minimum replacing the 2 reef lights (50/50's) with daylight bulbs. What is the temperature rating in k
of the tropic sun bulbs? Most likely they are either 6700k or 10000k. I would recommend getting the other choice for the remaining 2 so you have a better balance of light. The 6700k are very bright and yellow while the 10000k have a blue hue to them. IMO
a mix of the 2 would look very nice and put you at 150w which is 1wpg which in your tank is probably slightly over 1wpg true due to the size. Still not high enough for many species of plants but you could have a good mix of nice looking ones.
That's your only cheap option. Anything else requires at a minimum a ballast and bulb replacement, unless there is room for another housing where you could fit a HO
T5 or CF
bulb. While it might not look great getting a 24 or 48" single strip CF
would bump you up 65-130w putting you much closer to 2wpg allowing your choices of plants to go up greatly.