HI ^^

I have a led bar graph that I want to set up as a PLI (Im sorry tim but yours wouldnt fit in my saber ^//^).Does anyone know how to make one?? I was talking to a guy at a electronics store and he said just to wire in different resistors so as the voltage in the battery drops, the lights on the bar graph go out~ this seemed to make sense but the next time I went in to purchase said resistors another guy said it wouldnt work~
and he gave me this kit (http://www.jaycar.com.au/productView...UBCATID=965#11) only problem is~the min input voltage is around 10V~he said i may be able to wire it up just using the chip~any thoughts?If anyone likes I can supply a circut diagram of it (also i am planning on ditching the kits leds)