Hi Ken (the Black Knight) UK
Well one question is Black a colour (sorry color) ?? , So if its not a colour does it count its self out of this thread ,
Where i stand is by all means have a Black Xfire for the day time & summer , Then have a Red Xfire for night time & winter , The reason being your need a back up Xfire for when the Black one is dirty which will be about 10 mins after you have just finished cleaning it

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Cheers
Andy