Lighting Website Updates

[Travis]

BraenDead, that is correct. I forget exactly what PPFD stands for. CCT is correlated color temperature. It basically gives you an idea of what the color of the bulb is. Lower numbers indicate more yellow while higher numbers indicate more blue. I think it is pretty similar to kelvin where 10000 CCT = a true 10k bulb. The CCT rating for the bluer bulbs (14K, 20k) is usually off the scale and is listed as NA.

 

[palabok]

Sanjay, do you know anything on how good the IRIDIUS 250w DE bulbs are? THey are bieng sold by Custom Aquatics. Any info would help. THanks

 

[pvtschultz]

I did a quick yahoo search and it looks like PPFD is: photosynthetic photon flux density which seems to be a measure of the photosynthetic usable light emitted by a lamp or any light source for that matter.

 

[Ti]

tagging along

 

[Sanjay]

Sanjay, do you know anything on how good the IRIDIUS 250w DE bulbs are? THey are bieng sold by Custom Aquatics. Any info would help. THanks

No, I have not seen these lamps yet.

sanjay.

 

[Sanjay]

I don't see anywhere that mentions what PPFD and CCT stand for? I m guessing PPFD is similar/synonymous with Par?

Bob

Bob:

All the terms are defined in my very first article.

http://www.personal.psu.edu/faculty/s/b/sbj4/aquarium/articles/MetalHalideLamps1.htm

sanjay.

 

[trmiv]

Glad to see the AB 20K on there. I knew the PPFD increased when I went from the AB 20K to the Phoenix 14k, but I had no idea it was that much.

 

[glipper69]

what ever happened to the XM 15K 250Watt have you had a chance to burn and test it yet?

Thx
Frank

 

[Ereefic]

Sanjay, are there going to be any more 175w bulbs tested? I think the only one you show on your website is a AB.

Also, several bulbs seem to be the same bulb but marked 'SE 1' and 'SE 2', both of the same 'K' rating. Is this 2 of the same bulbs?

 

[Sanjay]

what ever happened to the XM 15K 250Watt have you had a chance to burn and test it yet?

Thx
Frank

Working on them.

sanjay.

 

[Sanjay]

Sanjay, are there going to be any more 175w bulbs tested? I think the only one you show on your website is a AB.

Also, several bulbs seem to be the same bulb but marked 'SE 1' and 'SE 2', both of the same 'K' rating. Is this 2 of the same bulbs?

THe 175s tend to end up low on the totem pole

I do not use them and infact I do not have a whole lot of 175s. In fact on ly 55G tank, I replaced the 175W with 150 De lamps and I think that is a better choice, given the reflector quality. There is some old data on 175s in my earlier articles.

http://www.personal.psu.edu/faculty...es/ballast comparison/ballast-comparison.html

I will be testing the XM 15K 17s and the XM 10KK and 20KK 175s soon. But I only have 2 ballasts for them - the magnetic ballast and the Lumen General Electronic Ballast.

When I have more than one lamp of the same type, I have been labelling them 1, 2.. and so on. So SE 1 and SE2 would indicate 2 different lamps of the same brand. This will give us some idea on the variation between lamps.

sanjay.

 

[Herbert T. Kornfeld]

I agree with Sanjay...want to know what bulb to get when you need to replace your 175s? A 150 (and a new ballast & socket)!

 

[Ereefic]

I've been extremely happy with my 175w MH lighting. For what they are and the application they've been used for, they've been great. No complaints.

 

[whodah]

sanjay: are you aware of the mysql connect issues on yer site?

http://www.reeflightinginfo.arvixe.com/selectballast.php

Warning: mysql_pconnect(): Access denied for user: '..@localhost' (Using password: YES) in /home/../public_html/Connections/spectraldatabase.php on line 9

 

[Sanjay]

Yeah... I was having trouble with connecting to the database from my home computer and I ended up screwing up the user account I had set up. It is fixed now and should work.

sanjay.

 

[Illusion]

Wanted to know if you are now Aware of

"JpGraph Error: HTTP headers have already been sent.
Explanation:
HTTP headers have already been sent back to the browser indicating the data as text before the library got a chance to send it's image HTTP header to this browser. This makes it impossible for the library to send back image data to the browser (since that would be interpretated as text by the browser and show up as junk text).
Most likely you have some text in your script before the call to Graph::Stroke(). If this texts gets sent back to the browser the browser will assume that all data is plain text. Look for any text, even spaces and newlines, that might have been sent back to the browser.

For example it is a common mistake to leave a blank line before the opening "<?php"."

James

 

[ulua56]

Sanjay, you rock dude, all the man hours you have spent, are much appreciated !!!!!!!!!

 

[whodah]

heya!

i second both Illusion on reproducing the error, and ulua56 on the thanks!

 

[Sanjay]

Sorry guys.. right now I have no clue why the plotting is not working correctly.

I had some problems with accessing database which I have since fixed. I did not change or touch any of the code. So I cannot explain the cause of this problem.

I works fine locally on my computer, and I have no clue why something that was working would not work anymore given that I made no changes to the code.

UNfortunately I am unable to figure out the cause.

sanjay.

 

[Reefvet]

Sorry guys.. right now I have no clue why the plotting is not working correctly.

I had some problems with accessing database which I have since fixed. I did not change or touch any of the code. So I cannot explain the cause of this problem.

I works fine locally on my computer, and I have no clue why something that was working would not work anymore given that I made no changes to the code.

UNfortunately I am unable to figure out the cause.

sanjay.

Because it's not the code, it's the MySQL database. You need to rebuild the tables. Your host should be able to help you if you're not familiar with how to do this.