The paper mentioned by Yuriy is Fuji DPII and it is a high quality paper, certainly as high quality as Kodak EP. Also the thickness of the base material is identical.
Also, regarding your claim to get "perfect prints" with your LED bulb light source. This is a very bold statement and I would like you to finally show us examples of these perfect prints. You have already made this claim in a
different thread and then only presented prints of very poor quality that exhibited terrible color casts. I am actually kind of surprised that you are still making such claims after the earlier thread.
Your criticism is welcome and helped me greatly to refine the process. I'll try to post some results tomorrow. I can tell you that the prints I'm getting now are much better. I haven't replied to that thread because of the demand that I stop posting images unless I have more scientific results. I simply don't have the time or budget to throw on damn expensive color cards to prove to other people on the internet it works. Someday I would like. I've been using scanned images in photoshop as a substitute to examine the color and am now happy.
First issue, colour casts over the image - this seems to have something to do with the bulb being too close to the condenser. Pulling it a little higher up seems to even things out. I posted a thread about this recently. The issue disappeared when I went up in enlarger lens sizes so I didn't notice it until stepping back down. I think I've always had it down too low, but never noticed. Red shadows are gone now that correct color has been found.
For grain, that has to do with two things. First the scanning resolution. So the images posted were much larger than real life, and second, this is is on a condenser so grain will obviously be pronounced, along with higher sharpness and contrast.
I also understand your skepticism without having seen any great results, but keep in mind I've been printing for less than a year, color for a few months and self taught everything from the internet. Why bother with LED bulbs when I can just go halogen? Well I have been asked the same question with regards to wet printing, why not just go inkjet? I have found a niche that works for me in the creative process and want to share it with others. One person has already contacted me via email ecstatic that such a bulb exists and is using it to build a custom 8x10 enlarger. There is definitely interest out there.
I want to post a guide but it's taking much longer than I had hoped.