It is right yes
You need to place the leds between the 6v rail to the collector of the transistor exactly like the way i did it in my circuit i posted
Well slap my head and call me Sally! I didn't realise that was how it worked!
This also doesn't make sense though! Now when I increase the voltage to the base of the transistor, the LEDs get dimmer. That's the opposite of what it should be?