Fluorescent tubes (lighting) at Homebase

VeryFrustrated

Homebase is selling fluorescent tubes at a very low price. I understand this is due to them changing supplier so selling the old stock. On top of this, they have a 'buy one, get obe half-price' offer. So, I got 2 tubes for under £3 (I wanted 2, the offer didn't get me to buy more than I wanted) instead of £12 (2x £6) at one of their competitors.

For example, see: http://www.homebase.co.uk/en/homebaseuk/tcp-tube-15w-450mm---1-pack-899643