Looks like the Kelvin rating is 4200k. Same as some CMH. 3100k-4200k.
Hortilux Blue has a Kelvin rating of 5500k, so they are vastly different, but, the halide you show, may still be a good bulb, but it doesnt have the same spectrum, as the Hortilux Blue.
New MSS bulb coming out, has a K rating...