Red Inc.'s emit Red, Far Red and No Blue, which Rauber defines as PAD (Photosynthetic Artificial Darkness).

Since SID is "Standard Indoor Darkness", both SID and PAD are recognized as darkness to the plants senses, but Red Inc.'s PAD spectrum causes the plants timer to run slower while providing Red as a Photosynthesis source.

The usual advantage of PAD, is both greater Photosynthesis and pigment pigment synthsis (THC) compared to SID.

In general I would say yes to your last question, and the exceptions are PAD spectrums so Far Red dominant that your probably never going to used them for photosynthetic and pigment synthetic lighting alone (unless you were using Rauber Enhancement which greatley modifies these effects.

The only draw back of Red Inc.'s I'd say is the same for spectrums with both Red and Far Red signalling, since the absorption going through the canopy reduces the Red Signal, while leaving the Far Red signal largely unaffected by leaf absorption, but somewhat absorbed by dense woody stem type grow. This causes high Far Red to Red ratios (~ low Red to Far Red ratios), which triggers stem elongation, on the other side of the plant that the Red Inc. source (Red Inc. on top, stem elongation on the bottom. Red Inc. below, stem elongation above. etc.)

I think of excessive stem elongation as grow WITHOUT what would otherwise be desired sythesis of molecule compounds or leafs by weight (useless woody paperry grow, PULP). Half as much stem grow with more syntesis of desired compounds (THC!) would be far more desirable.

Compared to Red Far Red spectrums Rauber Enhancement provides fairly uniform stem elongation top to bottom, side to side (volumetric uniformity), which tends to provide more compound synthesis top to bottom, side to side by it's nature.

Take care, Sal.