Shape of naga viper chillis

Im a little concerned at the shape of my naga vipers, i thought the shape was more rounded than long and thin.
Is the shape dependant on temperature or sun? I keep mine on south facing window but infront of my vertical blinds which is still very bright.Maybe i didnt water them enough, I know I was a little slow in giving my chillis a liquid feed.

 

They look like dashed good chillies to me!

Cheers, Tony.

 

Sure don't look like Naga to me! The Naga has a very distinctive aroma when cut/scratched too.