With the Silverstone air penetrators, the led is in the central hub rather than the frame and I think there are better results because it develops a circle of light rather than the lines of light you normally see. I have them in blue too.
And with the Bitfenix Spectre PRO GREEN LED, my brother has in his case and they are really bright too, push a good amount of air out, quiet and the blades are durable.
My friend has the Enermax TB in RED in his coolermaster HAF X case and they are very bright, all his interior is red from them. They are decent noise level and also are really good for cooling. I prefer them over the bitfenix spectre pro because you can have leds on each blade which makes it look awesome with its beam of light.