400W DE, anyone use em?

smokinreefer · #1 03-04-2009, 05:44 PM

hey guys
just wondering if anyone here has experience using 400W DEs?
if you can comment on how you like them, the output?
comparison to 250W DE?
thanks!

untamed · #2 03-04-2009, 06:02 PM

I can say that when I replace my current light fixtures I will NOT use DE bulbs again. I find it extremely difficult to install them and it is not a good feeling to break a brand new $100 bulb. Go with Mogul.

atcguy · #3 03-04-2009, 06:30 PM

DE are easy to replace.. I have never broken a bulb.. you must be careful with anything.......

untamed · #4 03-04-2009, 06:41 PM

Quote:

Originally Posted by atcguy

DE are easy to replace.. I have never broken a bulb.. you must be careful with anything.......

It's not like I try to install them with a hammer. Of course, I'm careful. So far, I've installed 18 bulbs into my fixtures and broken one during installation. Unfortunately, one is still unacceptable. I suppose it depends on the fixture, but there is a certain degree of force required to install bulbs into my fixtures. If nothing else, I recommend testing the installation of a bulb into any fixture you might be planning to purchase.

Whatigot · #5 03-04-2009, 07:10 PM

would you still go 250 brad?
or would you go to a higher wattage?

I moved my 250 de's another 2" off the top of the water after I saw how your lighting was set up btw....

untamed · #6 03-04-2009, 07:28 PM

Quote:

Originally Posted by Whatigot

would you still go 250 brad?
or would you go to a higher wattage?

I moved my 250 de's another 2" off the top of the water after I saw how your lighting was set up btw....

I've had fine results with 250W. Maybe things would be better with 400W..I don't know. Certainly, my power bill would be larger! If I had to do it again, my tank would be larger (6x6) and run 9 x 250W which would be about the same power consumption as 6x400W.

I have been tempted to run my lights closer to the water than in the past. No coral seems to mind how close the lights are. However, running them any closer to the surface leaves them more open to splashing and they get in the way of simple feeding. Moving them up and down for every feeding would be too annoying.

I borrowed the PAR meter and PAR measurements at the bottom of the tank are pretty low. (27" deep, I recall) However, I've also got coral that will reach the surface soon enough. There's enough light somewhere for everything.

GreenSpottedPuffer · #7 03-04-2009, 07:52 PM

I have also broken a DE bulb before and am not a huge fan of them. I like my mogul base 400's.