Combo lighting with led?

[needmorecowbell]

Hello,
I have a 30 gal sps dominated tank with the Chinese 120w LEDs on it. I'm thinking of either making a DIY 16" strip of led for supplement, or adding a different type of lighting. What would you recommend; pc, t5, mh, or supplemental led? I have the led hanging but I'll make a canopy if I absolutely have to,

 

[needmorecowbell]

Well i think I'm going with a 16" led strip with cyan and violet.. Maybe a small amount of red and green.