Need info: I just changed my MH bulbs - Page 3

Delphinus · #21 12-30-2010, 12:45 AM

Quote:

Originally Posted by DiverDude

The only thing I can think of is that the way the bulbs are specified is loosy-goosy

Afraid that's your explanation right there. If you look up Sanjay's lighting results he measures colour temp and just about none of them are actually what they say they are. It's just a product name but two different brands and what they label the same thing (10k 14k 20k whatever) could be very different alongside each other.

globaldesigns · #22 12-30-2010, 03:02 AM

Quote:

Originally Posted by DiverDude

This doesn't add up. 10K is 10K. If the Hamiltons are noticibly different then either they -or the Ushios- were not, in fact, 10K.

An analogy might be that you say the room is 20 Degrees C but the room is actually only 15 degrees. 15 is 15 and 20 is 20.

Of course, people can perceive colours differently but at the end of the day, 10K is....10K !

The only thing I can think of is that the way the bulbs are specified is loosy-goosy which might explain it but otherwise....

Well that is the problem, there are NO standards that manufactures follow. I have used Pheonix, Ushio, Hamilton, Coralife and now XM... They are all different even though they were all the same (so called) rating/K

I guess that is why there are so many threads of bulb choices, as you can spend alot of money trying to figure out what you like.

The Grizz · #23 12-30-2010, 05:43 AM

When I had my 155BF with SE 250w MH I decided to give it a good on eBay for some bulbs. I forget the brand name of the bulb but I got what they classified as a 14000k and I must say they where a very nice white, not yellow at all. I am looking at getting 2 new MH fixture and I plan on ordering 4 new bulbs from the eBay seller I got the last ones at 14000k and also a 10000k & 22000k or actinic to see what that is like.

globaldesigns · #24 01-09-2011, 06:59 PM

Update: Well the XM bulbs overall are very nice... the 10K's have whitened up quite nicely. I will say they are not as intense/bright as the Ushio's, but again now my upstairs doesn't look like a grow-op from the outside.

The XM's have a nicer spectrum of light, nice intensities without overpowering or washing out the tank.

Just thought I would let you all know.