Lighting Website Updates

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E-A-G-L-E-S,
Sanjay explains how linear bulbs behave vs. point source (T5 vs. halide) on page 19. There are slight exceptions to the inverse square rule with halides...mostly depending on the reflector...but even at that, it still applies to a certain extent that even with the largest reflector to spread the output of that bulb...its source is still a point and the light from the reflector isnt as intense as from the bulb itself. Halides might be more intense as you get closer to the bulb (also explained by the inverse square law), but as you go deeper, linear bulbs are able to carry their intensity deeper. LPS and shrooms melting on the bottom of the tank? This might be why. But as you go higher in the tank, and you are at one end of the bulb, the light coming from the other end of the bulb means less and less to you. If you add in the reflection of the glass in a narrow tank, you can sometimes have very little drop-off in a reef with T5s as you go deeper. Ive been doin' some research... ;)
 
I hate to side track Sanjays thread with T5 questions. T5's do not penetrate deeper than halides. Because the T5's can use a parabolic reflector and be placed so close to the water surface more of the light created makes it into the tank. Good 250 watt HQI halides and a good Ice Cap T5 system are going to get you close numbers as far as what hits the bottom of the tank. The difference is the T5's will give you an even distribution of light and the halides will be intense under the lamps but decrease as you move away. If you want to go into particulars about your tank start a thread and PM me a link and I'll answer you there.

If you want to get deeper into this start a new thread and PM me with a link to it.
 
Sorry Grim and every body else. Sanjay's thread was unintentionally high jacked by myself and it won't happen again. Hats off to Sanjay for his amazing dedication to helping all of us !
 
I have to agree completly with this. A few months bacl I did some comparison numbers between loss of light verses distance on both hides and florescent tibes. The hides loss light simular to the inverse square law but the florescents were more directionaly proportinate to the distance.

an example would be a hide putting out 100 lums at 12" sould give out 10 lumes at 24"
The florescent giving out 100 lums at 12 " should give out 50 lums at 24"

In both cases the numbers do not fall 100% accurate as you have reflector values, water clearity and other reducing factors also involved.

Dennis


<a href=showthread.php?s=&postid=7259399#post7259399 target=_blank>Originally posted</a> by hahnmeister
E-A-G-L-E-S,
Sanjay explains how linear bulbs behave vs. point source (T5 vs. halide) on page 19. There are slight exceptions to the inverse square rule with halides...mostly depending on the reflector...but even at that, it still applies to a certain extent that even with the largest reflector to spread the output of that bulb...its source is still a point and the light from the reflector isnt as intense as from the bulb itself. Halides might be more intense as you get closer to the bulb (also explained by the inverse square law), but as you go deeper, linear bulbs are able to carry their intensity deeper. LPS and shrooms melting on the bottom of the tank? This might be why. But as you go higher in the tank, and you are at one end of the bulb, the light coming from the other end of the bulb means less and less to you. If you add in the reflection of the glass in a narrow tank, you can sometimes have very little drop-off in a reef with T5s as you go deeper. Ive been doin' some research... ;)
Click to expand...
 
Sanjay?

In your experience or knowledge are the CoralVue 20 K 400 watt bulbs comparable to Radium 20 K 400 watt

Seems like your data shows PAR values within one point of each other

Run on PFO 400 watt HQI ballast?

Thanks
 
Sanjay,

I currently run 3 250 PFO mag ballast with XM 250W 10K bulbs. I would like to upgrade to 250W HQI ballasts and stick with the mogul sockets and same bulbs. What I cannot decide is whick ballast: PFO mag HQI, PFO electronic HQI, or Icecap electronic HQI. I saw the data on your lighting pages about the mag HQI ballast, but was wondering if you had any input on the other 2.
Thanks!
 
I just installed some Phoneix 14K DE 250's and love them to death ! I run Blue line elect. Ballast's and used Sanjay's awesome program to pick these bulbs out to achieve the results I was looking for and hit a home run !!! Thank you Sanjay, you just saved me alot of money and wasted time.... wish I would have found your program earlier so I could have saved even more time and money ! Sanjay, are you going to start a donation program ? Does one exist yet ?
 
at the moment i have 2 xm 15k 175w , im thinking of going to aqualine buschke 13k or 10k se 2 , should i ??? if so where can i buy the aqualine buschke 13k or the 10k se 2 bulbs ???
 
I too am intestested in the AB 13K. Par looks good. Just wondering how these compare in blue to the EVC 14K. My personal preference is something less blue than the EVC bulb.
 
After reading the article I'm thinking the coordinates would be more helpful than the cct. Especially if we could plot them to see the color of the bulb.
 
I would hate to ask a repeat question on here, but has there been any testing done on the "new" XM-15,000K 175W lamps? I bought a pair of the original "low PAR" lamps and like the color but really need the intensity to get things growing in my tank. I am looking at the Iwasakis as an alternative as it seems that they got it right, but for whatever reason I like the XMs on magnetic ballasts.
 
<a href=showthread.php?s=&postid=7305474#post7305474 target=_blank>Originally posted</a> by myusername
OK, what is "Sanjay". and where can I get it.
Thank you
Click to expand...

That is soooo freeking funny^^^!!!!
 
<a href=showthread.php?s=&postid=7347116#post7347116 target=_blank>Originally posted</a> by pvtschultz
I would hate to ask a repeat question on here, but has there been any testing done on the "new" XM-15,000K 175W lamps? I bought a pair of the original "low PAR" lamps and like the color but really need the intensity to get things growing in my tank. I am looking at the Iwasakis as an alternative as it seems that they got it right, but for whatever reason I like the XMs on magnetic ballasts.
Click to expand...

Is there a "new" XM 15K ? I have not seen it yet.

sanjay
 
I had heard through the grapevine that XM had corrected their inadequacies with the original 15,000K lamps trying to crank up the PAR. I never heard back from HelloLights if they knew anything so I was wondering if maybe someone around here had an definitive information. You would think that there was enough of us on here that they would notice that they aren't selling many of these lamps...
 
Giesmann Coral and BLV Nepturion look like an xm 10k with more blue and less purple. The BLV looks to be a little more blue based on the graphs, but not much. I'd love to see pics of these compared to the xm.

PS, Sanjay, what type of ballasts do you run? One of these might be a great bulb for your new tank.
 
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