Edit - sorry I also misread your earlier posts... these probably won't work for you either but I won't delete them just to share with others who may search for something like this later
Try this now that I understand
http://www.lampsplus.com/products/30...sories-_-30109
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I have a couple of different varieties in my house
This one I have on my front porch hidden in a corner and also at the bottom of the stairs in my basement theater room - if anyone approaches the stairs it lights up and illuminates the bottom landing (and where it ends). The one on the porch is ceiling mounted in a corner and the one in the basement sits on a shelf at ground level.
http://www.ecopa-ball.co.uk/ I think I bought mine at theledlight.com
The other one I don't see any longer (but think I bought at the same place) - basically the same thing (LED motion light) but smaller in a little tube a little bigger around than two 'D' batteries.
I also have (but have never installed) a motion sensor light switch (generally available at places like home depot or lowes)... if you have a light switch and the light on your stairs isn't too bright such that it disturbs the environment you might consider one of those.
Here's one but they have a page of ones with no delay option, etc etc
http://www.lowes.com/lowes/lkn?actio...P-L&lpage=none
Enjoy your porn in safety! (lol, j/k)