I also have researched this and can corroborate that LTH is a DVD, not Blu-ray, spec. I ran in to the same problem–my new Blu-ray player that accepted a firmware/software update read the LTH disks, but my older Vizio Blu-ray player (which I could NOT update) refused to read the LTH-written Blu-ray disk.
Here’s more info,straight from the horse’s mouth (err…Ritek, that is):
BDR-254-RDIWN-CB50 Ridata BDR 4X HTL inkjet white hub printable, 50 cake
BDR-254-RDIWNCB50L Ridata BDR 4X LTH inkjet white hub printable, 50 cake
BDR-256-RDIWN-CB50 Ridata BDR 6X HTL inkjet white hub printable, 50 cake
Watch out for Blu-ray disk model numbers that contain “L” at the end of the model number.
For example,on the Newegg web site I spotted this:
RiDATA 25GB 4X BD-R Inkjet white hub-printable 50 Packs Cake Box Disc, Low-to-High Model BDR-254-RDIWNCB50L
Ritek Ridata Blu-Ray (BD-R) White Inkjet Hub Printable 6X BD-R Media 25GB 50 Pack in Cake Box (BDR-256-RDIWN-CB50)
Notice that the LTH disks end with “L” in the model number. “254” vs. “256” in the model numbers designate 4X vs. 6X writing speed. FYI!
Rich Kutnick
VIDEO IMPRESSIONS