The appropriateness of a safelight is determined as much by what colour of light it emits as it is by how bright the light is.
The top line safelights use light sources and/or filters to ensure that the spectrum of light emitted is very narrow, and very appropriate to the sensitivity of the paper.
Most (but not all) "red" sources also emit some blue and green, which unless some filtration is used, will either fog or otherwise affect the behaviour (contrast) of photographic paper.
If the claims for that eBay item are correct, it appears appropriate.
By the way, red safelights of appropriate brightness are suitable for multigrade papers. The reason that "OC" or other multigrade specific safelights were designed for multigrade papers is that the colour they emit provides higher visibility than red alone - it is a consequence of the nature of human vision, not the makeup of the paper.
