there 175's i dont remember the brand ive had them away for a few years. i say yellow maybe because i was so used to my pc's. i just want some more color from the corals that i had with my pc's i tried the coral life 20k didnt like them. and dont know if i should try the 10k's. i just dont want to keep changing bulbs my lfs is good they change them for me but i dont want to abuse there help either. should i put back my pc's and take off the vho's?