I have heard not so good things about them so I'll go with nadia genetics. If you need to change the light for it to flower it's a photo. No such thing as a "semi" auto, its either a auto or it's not. That's what make a auto a auto... its automatic lol.
These "semi autos" are also known as fast strains and they have been common(bred to stable fast instead of stable autoflowering) in northern outdoor strains. For example the famous danish strain typhoon is such, they go back to at least 70's.
The thing is that when you just start to mix autos and photos, you get autos, photos and earlys, or what here was referred to as "semi-auto". Only lately wider commercial breeders have started to stabilise strains to be fast. Its just originally danish folks did this to get at least some bud during short summer, but now commercial focus is more on fast crops, but not autoflowering.
Then when low ryder came, northern folks moved more to autoflowers, because if you are even a bit more to north, you need to veg the plant inside for it to have any chance to survive until its ready, even if its one of these fast strains. Also the difference is that the outdoor strains like this have been bred to be extremely mold resistant, meaning more airy buds with more leaf and the breeding focus has been more in making the plant survive in the first place and grow big, not so much on potency.