brake light bulb problem..., need red one .... Options

[cyprus_gt]

Hello
so i order clear lense for my brake light stop ....so i need a red light/bulb for my clear lense....
i bought small wedge bulb with the same size connector and connect it.....its work fine!!! but when i start the car on my dash i see warning indicator that i have problem with my lights...the original bulb is 12v18w ...i dont know the new one?
so can you give me some suggestion what to do to remove this lights on my dash or what kind and from where to get the red buld-wedge that can work correctly!
Thanks a lot

CHEERS

p.s.
there is a picture with the old-on left and new wedge bulb....bad quality but you can see...

[DEATH]

LEDs are gonna do that to you - bulbs won't. It's due to the resistance somehow [not an electrical guy]. I'm sure there is a resistor you can wire in or something that will fix this and I'm equally sure one of the electronics gurus will be along shortly to confirm this.