Saw these in Manplin today - reduced from £7.99 to £4.99:
7 meter cable with 9 ball LED's - blue - Solar powered: really impressed with them when I wired them up and they glow beautifully in the garden at night.
they also had a 50 LED string of multi colour lights powered by solar for £9.99 - v tempted, but thought that it might be OTT (until Christmas arrives - then no sun to solar charge....) - worth mentioning though as they too are a bargain!!
the link shows a pic of both on page 17 (yes - i know thats the Christmas specials - but its for the pic ;) )