Metal halide people I have a question?

[oreo54]

The tank is still under construction unfortunately. I don't think the XM bulbs are available new anymore. I've seen a couple here and there for sale but they are usually the 20k.

10000k or the 15000k? The ones you have. Just curious.

IIn your previous post you had 6500k grow bulbs linked. Has anyone used these or similar bulbs over corals? The price difference is attractive.

6500k Iwasakis was a "go to" bulb for growth and probably hidden pigments at one time.
Iwasaki seems to have also made a "6500k" bulb specifically for reef aquariums. ReallY A 10000K-ish bulb.
Less yellow.

Metal Halide Lighting - A brief overview | Melev's Reef

melevsreef.com

Bulb Kelvin Rating:
Bulbs come in various 'colors'.
6,500K is yellow, and unpopular. People used them to get fast growth out of their corals.
10,000K is a popular color with good penetration (or PAR)
12,000K is another popular choice, with some blue
14,000K leans into blue.
15,000K is more blue.
20,000K is very blue.

 

[56longroof]

10000k or the 15000k? The ones you have. Just curious.

6500k Iwasakis was a "go to" bulb for growth and probably hidden pigments at one time.
Iwasaki seems to have also made a "6500k" bulb specifically for reef aquariums. ReallY A 10000K-ish bulb.
Less yellow.

Metal Halide Lighting - A brief overview | Melev's Reef

melevsreef.com

They are 10k.