I picked up the Hourglass Ambient Lighting Powder in Diffused Light when the line first launched and I was not impressed at all. It was a translucent powder. A fine powder, but nothing special and certainly not special enough to justify the $45 price tag. I eventually got rid of my Diffused powder and wasn't interested in learning more.
Then I saw Dustin Hunter's video overview of the line. Like me, Dustin is on the pastier side of pale and he mentioned that he liked Mood Light as a blush. I swatched it in Sephora one day and it swatched dark enough on my skin that I was intrigued.
In the pan, Mood Light looks like a very gray purple color. Like Diffused Light, it doesn't have any detectable shimmer.
The pictures here do not do this product justice. It definitely has a color. A subtle color, but still noticeable on my skintone. I could see deeper skintones using this as an all over setting powder. That wouldn't work for me at all. I'd look crazy.
On my skintone, this works as a blush, subtle and natural looking, but with enough oomph to provide definition. It has good wear time. I get a good six hours out of it before it faded at all and nine hours before it was gone.
Like the other Ambient Lighting Powders, Mood Light contains 10 grams of product and retails for $45. It's a baked powder, so it does require gentle handling as it is easy to break off a piece of the product. Mood Light is available wherever Hourglass is sold. I picked mine up at Sephora.