Need new mh bulbs...switch from XM 20K to ????

[VikeBron]

It is that time again and I am thinking of switching my 20k XMs to a 14k or 15k of that brand or another. What is your experience with 14 or 15 bulbs?
I need as much info on XM, Hamilton, Corallife or other brands. I am not satisfied with the growth from the 20k. Here are the specs of my tank.

375gal glass
40gal fuge/sump
200gal prop/fuge
100gal rubbermaid

Closed loop run by 2-Hammerheads with 6- inch and a half heads on each loop. Return run by Hammerhead w/2- three quarter inch loc-line.

4-400w mh w/20k xms. 8-48inch 54watt T-5s

Of course, I want the best of both worlds. Massive growth with brilliant color. I don't ask for much

:) Thanks

[tonyscoots84]

if your not satisfied with the growth on 20k's i dont think u will be satisfied from the growth on 14-15 k bulbs... if you want good growth and ur water quality is there i suggest 10k with supp. lighting such as uri super actnics in vho or the tek t5...