The US DOE just issued a fact-sheet addressing the blue-light output of LEDs. It is a very good read for anyone concerned about this topic. The following two images are the crux of the document.
The first chart shows the spectral output of different light sources normalized at 500 lumens. I’ve never seen this direct comparison before and it is great to one concise chart:
And the “money shot” is contained in the following chart, which shows that blue-light content is really dependent on color temperature, not the specific type of light-source.