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Originally Posted by reef_raf
DE is the best way to go for 250w, IMO. The intesity rivals or surpasses 400w, and the power consumption is significantly less.
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where did you get that from? there is no power difference between a DE and a SE bulb and it has been showen already that over a 2x2 square a SE will through more intensitity over a larger area. the "ONLY advantage to a DE bulbs over a SE (remeber I am talking about both being HQI bulbs as you can get them in both se and de) is the actual space it consumes. as for heat if you have both in a enclosed hood you will also get the same amount, but the DE will be able to put less heat into the water depending on how it is used.. if it is suspended you will get less and if you cool the canopy you will be able to lower the temp with out lowering bulb temp.
basicly if you don;t have the room go DE.
Steve
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