i agree, i went to a mooohassive BnQ that was close at hand, and they dodn't even have big bulbs in the curly shape as used by everyone, let alone Y splitters, i had to settle for two 1M tubes, not used em yet, they're prolly the wrong shade. as said, might as well just get an hps, there are loads of realllly good stores around,
http://www.aquaculture-hydroponics.co.uk being REALLY good, although they use city link even for the small parcels which sucks, royal mail would have it waiting 500m down the road for me, city links little "we missed you" note got chuked to the side by the other house people, so i found it after too long and had to spend 2 hours driving around to find their depot. other than that though, first rate, seem to have a good stock at goood prices.