The 40 is the wattage of each bulb. You have a standard 40 watt fluorescent fixture which means you have 80 watts of light. That's barely enough for a freshwater tank and maybe, just maybe enough for fish only saltwater. You are never going to be able to have any corals, anemones, etc that require light, without upgrading the lighting. Like I said you need between 3 to 5 watts per gallon or wpg
. For this you are going to have to buy one or two new fixtures. In order to get this much light on your tank you will have 3 choices. Vho
, or mh
. I recommend power compact(pc
) but it depends on your budget and what you want to have in your tank. Pc
will do for most any coral you might want. Mh
is best but can be expensive and isn't absolutely necessary for most corals. So, as I said, you need to look for a light or a combination of lights that will add up to between 225w and 375w or more if you want with 225w being absolutely the minimum and 375 being best. Do a google search for "power compact lighting" and you will find every light imaginable. Find one or more that you can afford and meet your needs(white and actinic) then come back to AA and start a post about what we think about that particular one. Or you could just start a post now and get some ideas on brand names. My pc
on my 20 gallon is a Jebo brand which is inexpensive and I got it on EBAY. There are many good brands in every different price range so look around and ask lots of questions.