It was just a picture I had taken with Instagram. The bulbs are retro white which i can see blue.
I never work with them running.
They've been available for almost 17 years + now. The early issues were that when they failed - they failed catastrophically. (they blew up!) Only recently has Phillips been able to re-design them to be certified for use with out an enclosure. (Frag shield!) That's also why they're only available in 400 watt for so long.
To make the most from their spectrum (especially the non-visible uvb's) it's suggested that they not be used in a glass covered enclosure. (The glass actually blocks most of the usable light at these frequency's.) They are so efficient producing useable light - that they actually run cooler to the touch than other bulbs. (Instead of wasting watts on heat as a byproduct they are more efficient at creating actual usable light.)
They are mounting specific! Vert or horizontal ONLY! They cannot be used with a digital ballast - This bulb requires a Tranx, cap, starter, HPS ballast to produce it's superior light spectrum. This spectrum is very different than any HPS or MH bulb on the market. It produces white light and dips below the blue spectrum and goes above the red spectrum. Vertical bulbs actually have a greater PAR efficiency as well as a longer lifespan. Both in horizontal and vertical configurations they only lose 10% efficiency and light output over their lifetimes.
The most important info that chart gives you is where it shows the available, non-visable spectrum that replicates natural sunlight as best as any available bulb can.
They go for around $52 bucks. Dollar for watt(x PAR) they cannot be beat. Then there's still that whole "full spectrum" thing they have going for them too.