Technical splash shield question with T5 HO lamps

mrkubanftw

New member
Hey guys, I have a Coralife 30" T5 HO fixture that has two 34 watt actinic bulbs and two 34 watt 10,000K bulbs. Its a 36 gallon tank with a 10 gallon sump that flows around 500gph. Sump is a 3" mineralmud bed with about an extra inch of crushed coral substrate. Also run a Coralife 60gal protein skimmer in my main tank with 2 450gph powerheads. I would put my total water flow around ~2000gph.

My question is, iv done everything possible to reduce splash and surface bubbles to reduce my top water splash to near nothing, would it be wise to remove my splash guard from my light fixture to achieve maximum light output since I no longer have splash? Iv read extensively on the topic and the only possible issue I can come across is it may affect the cooling of the fluorescents? There is one ventilation fan on the top of the fixture, and I know if the bulbs get too cool from excessive air ventilation it can decrease performance on the bulbs? Iv also read likewise, overheating bulbs (reduced ventilation) can also cause the same result. Basically I'm looking for feedback on what personal or experienced opinions are. I run all types of corals (sps, lps, soft). I'm particularly concerned with my Xenia coral. Iv read they (lighter colored corals in general) do best under intense lighting. I acclimated mine about a month or two ago and they are just now starting to pulse more frequently. FYI my T5 bulbs were replaced with new bulbs roughly 2.5 months ago.
 
After stumbling across a few websites describing T5 bulb effiency, it is widely believed that maximum lumen output is achieved at around 35C or 90F of ambient temp. This now begs the question, does anyone believe my fixture will maintain roughly 10 degrees over my tank water temp and roughly 15 degrees over air temp of the room? I believe it will but I'm not a thermodynamics engineer.

If then I do have reduced lumen output due to lower operating temperatures, then begs the question am i still ahead because iv now reduced a surface my light has to pass through? Sort of give and take to get ahead?
 
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