dgasmd
New member
pondfrog said:I guess my thought process on bulbs over these big tanks has come full circle. If we are after PAR -10k XM is the way to go. Then simply adding VHO actinics will change the color to our liking AND add some MORE PAR to the tank. So, if you have the space above the tank doesn't it make the most sense to go this avenue?
Steve
Not exactly. As you go bigger with tanks, striving for more efficiency becomes harder. Adding VHO to a large tank can be not only an expensive proposition with the large number of bulb replacement required every 6 months, but also a difficult proposition to cover so much ground. Also, the required number of bulbs and wattage to cover so much real state can be pretty high. This is so much easier to do in a smaller tank.
Yes, that seems to make sense. But...it seems Radium is the most talked about in regards to early replacement. No idea if internal structure of the bulbs leads to early retirement or not. I don't think they are the same bulbs, but perhaps close enough?
I did not mean they were made by the same manufacturer and marketed as different. I meant the internal and structural characteristics. XM 20000K are pretty much the same if not worse as far as requiring changing every 6 months. The others it is hard to tell almost all the studies show the PAR right out of the box and not the time line as they degrade over time.