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#2
11-25-2008, 09:06 AM
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Just a note, Cree claims efficiencies of around 100 lumens per watt also, depending on chip temperature. http://www.cree.com/products/xlamp7090_xre.asp This is only one of Cree's LED chip products, and there are many other great white LEDs by companies such as Osram (Sylvania) and Lumileds (Phillips).
I'd be curious to see the PAR value of Cree's cool white LED products. I like LEDs for the fact that they are solid state ie: less prone to breakage, and they are rated to last 50 000 hours, though the actual useful life will be less for our purposes. A big detractor from xenon bulbs is the rated 3000 hour life, which is less than both MH and fluorescent... wow, hope the bulbs are cheap! I'm glad that forums like this exist so that open discussion can make us think of new ideas. If xenon can produce higher PAR values, perhaps we will see the advent of 150w xenon metal halides in the future... though I doubt that the aquarium / horticulture segment of the total metal halide lighting market around the world would be enough for manufacturers to start producing larger xenon bulbs. If indeed the lumen output of these bulbs is lower than our traditional metal halides, I can't see these lights making it as a replacement as they are not fit for the traditional use of HID lighting (task and area lighting) even if the light is superior in terms of plant growth. I still maintain that this (xenon) is probably the BEST way to light a pico to small nano (less than 10g), at least if you want SPS or other intense light requiring organisms and don't mind changing a bulb more often than usual. I suppose you could use PC, but then you don't get those glitter lines that I so love with MH lit tanks.
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Calvin --- Planning a 29 gallon mixed reef... Last edited by BlueAbyss; 11-25-2008 at 09:19 AM. 
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#3
11-25-2008, 01:14 PM
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Quote:
Last edited by sphelps; 11-25-2008 at 02:44 PM.
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#4
11-25-2008, 07:49 PM
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I cant find the par value site yet
 the last link was just to show that a xenon is infact a mh using same burn temp and metal salts,also that last site was mentioning how a xenon produces light more efficientlly than an led by 3% I think it was. That was to put to bed the notion that xenon is less efficient than a traditional mh. I'm sorry I'm in the middle of a move and dont have much more time for research but im sure if you look you can find the par value site....or you could just take my word for it lol The results were this watt for watt the xenon hid has a slightly higher par value than a traditional mh.My personal thoughts remain that with a little tweaking this technology is perfect for a nano reef 14gal and under where a 70w halide isnt practical. Xenon hid will never replace mh 70w+ because its the same technology just different firing gases that arent needed in a bigger bulb. I enjoy debates like this,I hope no one takes me negatively just bothers me when people dismiss something without either trying or researching it first. The fella here powering his 5.5 is happy with the light he claims no heat issues and looking at the pic his tank is glowing something fierce,his corals look happy and have good p.e. As for the comment that your corals have p.e even in the dark...well duh but try keeping them in the dark for a week or two (the time he's been running this light) and see what happens lol
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#6
11-25-2008, 08:02 PM
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Heres a thought for a reflector being as its a headlight........car salvage yard lol If your thinking maybe voltage is a concern being at the moment they are just car parts,check out the wiring on these l.e.d pico setups people ar loving;buck pucks and tigers and bears oh my lol
Last edited by dabandit; 11-25-2008 at 08:08 PM.
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#7
11-25-2008, 08:17 PM
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Quote:
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#8
11-25-2008, 08:29 PM
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Arent you friendlly.I've spent a week researching this....think about it b efore you go accusing me of being a liar AGAIN Par value is the percentage of light that reaches the target after disspation via heat and such is it not? Now take a mh bulb and compare how far the light goes to a headlight on a car better yet look directlly into each because your begining to annoy me
 Through my research I've found what I wanted to know and believe I've provide enough proof that this is a viable technology,if thats not good enough for you thats not my problem try google,then come apologise when your done
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#10
11-26-2008, 03:14 PM
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sorry to say, but these lighting systems were not invented with this purpose in mind, it took someone who loved the hobby to give it a shot and grow from there. come on....
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Hybrid Mode
