I've never even grown glosso, let along ordered it from online. My guess is that it would grow easier in Ecocomplete, 'cause getting it to root down in 2-3 mm gravel might be a lot tougher.
As far as my readings go, I gather that 6700K is optimal for plant growth. The Dual Daylight is probably a good one, too.
Good advice from Rex on paying for the decent shipping, esp. summertime!