hey Shaun, in my opinion i think it is generally better to get the t5 lighting units that you will see at a lfs. i think i saw that you have a 1.2m tank, so the 4x 54w units will be good for softies and some lps. when you go DIY it may be a bit cheaper but you need to include the ballasts which are generally 2x54W so two of these, then reflectors are important as they increase your light gain by something like 80%, then ofcourse the bulbs themselves, generally 2x 10 000k and 2x actinic.
buying a built unit also generally looks much neater unless your DIY skills are great or you are looking for at doing something specific.
as for the phillips bulbs, im not sure they will be adequate for tank use, especially if corals are included. im sure any lfs would steer you away from those.
my tank is 920 x 600 x 600