UVL Super Actinics.
But what 14,000Ks are you going to get? If Ushios, I would suggest not actinics, but blue+ bulbs, since Ushio 14,000Ks already have loads of actinic, but unlike alot of other 14,000Ks, lack the huge blue spike.
If you were to go with the pheonix 14,000Ks, they do have the huge blue spike, so the UVL Auper Actinics would be a better combo.
OF course, my favorite is to just run 2x250wattDE halides with 10,000K bulbs for the best coral pigmentation and growth, and then have 4x54wattT5s running 2x blue+ and 2x actinic03 bulbs to make a very nice 'day-blue' look. I have friends that run this 2:1 ratio of halide to T5 wattage and bulb color, and their results are by far the best I have seen anywhere.
Thats enough light for a 120g though... a bit too much for a 55g. FWIW, I would do a 75g over a 55g tank, but if I had to do a 55g, I would just go 100% T5. the halides are a waste on a 55g, and FWIW, you can get more light out of a 4-6 x54wattT5 setup than you can with dual halides. A 55g is just too tall for 150wattDE bulbs, so you go with 250s, but dual 250s can run a 75g or even a 120. Besides, most of the light output simply spills out the front and back of the tank because its sooo narrow with a 55g.
I have a good buddy (ex-coworker too) who used to run his 55g with dual 250wattSEs because his tank is about 8 years old. I convinced him to ditch the halides, and go with a 6x54wattT5 setup. Hes very glad he did. He says he has more light, less watts, and everything just looks better. For a long narrow tank like a 55g... T5s are just the natural best match.
Dont get me wrong though... if it were a 60g/24" cube, Id be pushing the 400watt halide pendant in a lumenarc3 (I have that setup).