My seed order came in and I bought one of those bulbs.
(enter shameless plug for purealtitude seeds-stateside)
So it arrived a couple of days ago and I didn't have a chance to test it till today.
Here's my test card-any pet store that sells reptiles will have these, don't remember exactly how much I paid, certainly less than $10.
Good for 800 tests each card, doesn't react much with UVA, definitely works with UVB.
A card under normal light.
The card 12" from a 2 ' version of this bulb.
A little less than moderate.
After the card returned to normal, 3min., I lit it up with the "pure" UV bulb. Cover on.
@Skiball You sir, chose wisely!