Correct Radix,
Lightroom 6 is the standalone you own it, full version.
Lightroom CC (2015) is the cloudbased rental equivalent
Interested in a very high quality pixel based editor? Free beta trial available for Affinity Photo if you search. Very good and nicely stable - some bits I would argue are faster than Photoshop. If they match prices with their vector design product, Affinity Designer, you'll be looking at £40.
Pedigree? PC users will understand the pricing policy if they consider Affinity is the artiste formerly known as Serif. They've moved over to Mac and seem to be shaking things up a bit in that part of the world.
Rob