Hello again, another thread to collect your interest in diffusers in different colors. 
Diffusing cap gives a warm comfortable glow that is very pleasant on eyes at night. Now we got these samples of diffuser including white, yellow, orange, purple, red, and pink. As long as there is an amount of demand, we will sell them in the future.
Just let me know if you are interested or not. Available in more colors or white is enough?
Personally I only use white diffusers for night/urbex photography. However, I can’t see anything wrong with more options. Red has some professional use cases. Darker colours like purple will attenuate a lot of light. Lighter colours such as yellow, cyan, lime green, etc will transmit more light.
The only time I use a diffuser is on the C01 that’s hanging from my dog’s collar. Not to see, but to be seen. I have a grey dog, and don’t want to break my neck when walking after sunset. As a matter of fact, I even have given some away to other dog-lovers.
As a whole I have no need for a bigger diffuser. IF I would need one, about once every century, I use a plastic coffecup to use as a makeshift diffuser. You can use other objects too. The Yakult (probiotic milk beverage fermented with a bacteria strain) 65 ml single serve container, fits a Surefire P6 as if it’s custom made for it.
Your diffusers are very reasonably priced. For this reason, I would buy many colors for the fun of it. I would most likely use red, white, yellow.
Thanks!!
Seth
How about a diffuser lens kit like this one:
and
I vote for yellow.
YES YES YES!!!
This is a very good idea.
Yes …. great idea. Please include Blue and Green.