How about this?

[mr. luke]

http://www.diytools.co.uk/diy/Main/sp-4 ... th-pir.asp

Lidl has some in at the minute which consume 8w of power and has 160 ''ultra bright leds''

Im going to test one out and if they are any good ill buy a few

 

[FishBeast]

I like it. I how would you know that it is the right spectrum of light?

 

[mr. luke]

I wont know for sure, but im getting one tomorrow hopefully and ill report back how it is.
If you can see a light, you can usually grow plants with it