Was posted on here 2 days ago at £7.99, They're battery operated and can be used indoors or outdoors, so you can hang them pretty much anywhere! They come with 8 functions of flashes, fades and twinkles or you can just choose to have them steadily shining bright. They can also be set on a timer, which is perfect for outdoors so you won't have to pop out each evening to set them going.
Argos eBay linkhttp://stores.ebay.co.uk/Argos?keywords=200%20led%20multifunction%20string%20lights&aspectFilter=%7B%7D&sortOrder=BestMatch
dont forget 11% tcb on xmas decs - psmith1958
Multi coloured are now £4.99 but stock is very limited :)