whistler

I agree with the challenges of the darker colors such as blue, green, purple, & burgundy. They're even a challenge with 6500K. But, it offers the best option because of the "blue" in the light. Plus, I've seen how a warmer white (3500K) seems to work better with the day/night acrylic or film as compared to using 6500K. It doesn't look great but it looks brighter. But, getting the end user to accept it is the challenge and that means samples need to be provided to aid in the decision maing process. I'm agreeing with you on the use of 5500K for channel letters as I find it more appealing. But, when dealing with the end user it's based on what they want and like which may go against what you are proposing. With that everybody has a different concept which makes it difficult to establish any kind of a true standard. For me just having some guidelines to work with helps in the decison making process and has helped in working with the end user.

I find you comments interesting. Based on this it seems that the standard hasn't been established although most seem to default to 6500K. I'm just starting to see the advantages of the different color temps depending on the face color and materials.