Energy efficient bulb

[Daveyh]

I've got a couple of office style uplighters that use old style 300w thin 5" long bulbs (no idea what they're called). Like the ones that go in outdoor floodlights.
Is there a more efficient direct replacement available?
DH

[VxDuncan]

Don't forget they are tungsten-halogen, not just tungsten, therefore significantly more efficient than "traditional" lamps(bulbs) to start with. For refernce the Philips Tungsten Halogen "energy efficient" replacement bulbs are 70W for a 100W tungsten equivalent.

There is this though, which will save a bit
http://www.energybulbs.co.uk/products/Halogen+Ligh...
bit doubt the outlay is worth it for the energy saving?