The 50 watt "plasma globe" from hydroponics hut is an induction bulb...which they do not advertise the Kelvin color temperature of, so you wont have an idea what quality of light you will get. You can get the exact same bulb for 70 bucks, just Google induction lights, and follow a few of the sponsor adds. You'll find that bulb, and many others. The hydroponics hut...just added a white plastic cover to the bulb, and charged $150.00. That reflector must be awesome! Hydroponics Hut then advertised the bulb as plasma, which it is not.
Regarding that particular bulb, they are effective, and can easily be placed anywhere in your room. They are not primary light, but they work great as a secondary source, just like T5's. The benefit to this bulb is that the built in reflector from the base, provides a level of directionality for the all-important light photons that our plants want. I can hold the bulb in my hand after its been running for hours, and it feels warm. I have placed the bulb within two inches of my girls, and have seen no negative heat or light stress issues. The bulb surface does "feel" cooler to the touch than two foot T5 tubes. The bulb will screw right in to any normal E27, (Edison type) light socket.
I have not used induction bulbs for anything other than side lighting yet, but I can see their potential for vegging, rooting new clones or lighting a mother.
Induction lights have their place; just dont spend 90 bucks for a little plastic reflector to cover a bulb.
Prost!