I like it since I have extensively upgraded all rear lights on my 14....why don't you take a pic of it at night....in your garage maybe with all other lights off.....take a distance pic with a rubber band around your brake lever...and some closer pics so we can see what kind of a red hue glow around the light it puts out....the stock unit is very basic and not very impressive...
That is actually the WORST way to take a picture of a light when comparing before/after brightness. The best way is during the daytime, from a distance, at nearly the same time, with camera on same settings and distance before/after.
Night pictures tell you nothing, because ANY light is enough to cause the camera to close off and all lights are overexposed. You need enough light around the rest of the picture to normalize everything.
Need proof? Look at the pictures where he did what you requested. Notice that everything in FRONT of the bike is much brighter in the second picture, where the tail light is brighter