I cannot change the color or uneven texture of the wall. How will this affect the reflected light.
Regarding the color:
Once again, the color of the wall behind the TV should be neutral. Its coloration can alter the color of the light reflected by it. However, if there is some coloration in the wall, a 6500K illumination will still be better than any other color of light. The wrong color of light only adds more color to the reflected illumination.
Regarding the uneven nature of a log wall, you will get uneven reflections. The farther out from the wall the TV and backlight are, the more even the illumination will appear on the wall.
Instructions were minimal. Surprisingly there were no generic type diagrams of recommended installation methods.
Unfortunately, it is impractical for us to attempt to provide detailed instructions for the myriad of TVs, wall mounts, and install variations in use today. This is not a complex technology or product. We rely on each customer's familiarity with their own particular equipment, room, tastes, installation peculiarities, common sense and a little experimentation.
We are a very small company. I'm not a graphic artist, nor can we yet afford to hire one to generate the kind of diagrams found in many products' informational documents. You may have noticed that we don't advertise anywhere. Our marketing budget is very small. All marketing expenses must be passed on to the consumer by folding it into the selling price of the product. We have chosen to pursue industry exposure that costs us very little. This has allowed us to keep our prices down. In fact, our two newest models' revisions included substantial price reductions.
We believe successful implementation of video backlighting depends most of all upon an understanding of the fundamental objectives. Those being:
#1. To provide supplemental illumination around but behind the screen when viewing in the dark.
#2. That illumination should be less than 10% of the brightest white on the screen.
#3. The color of white light used should be as close to CIE D65 (D6500K) as possible.
#4. The color of the wall should be as neutral as possible to preserve accurate color perception.
Once the fundamental principles are understood, the proper installation should be simple to accomplish for an individual system. We actually provide more of the really vital information required to get it right, than any competing product available.
Most of what Philips instructs their Ambilight users to do is actually destructive to image fidelity, viewing comfort and is contrary to proven principles of imaging science. The other competing products for backlighting televisions currently available just try to emulate Philips' approach.
Readers of this forum have achieved better results on their own, than Philips has with all their R&D resources and God only knows how many engineers. Our goal is not to provide something cool, new and interesting. Our primary objective is always to help people get the best image their TV can provide. If you have specific questions about your individual installation, we are eager to help. You may have noticed I have spent a lot of time contributing to this thread and forum. Most of my posts have been generic in nature, rather than focused on discussing my products. One exception has been when responding to specific questions about the use or nature of what my company builds.
I'm genuinely interested in educating the readers of this forum about imaging science, for their benefit. I know many readers have built their own backlighting with various measures of success. If I can help them along to build their own solution correctly to meet a limited budget, I don't mind. Good will has a way of benefiting everybody eventually.
Best regards and beautiful pictures,
G. Alan Brown, President
"Advancing the art and science of electronic imaging"