For a very limited use - i.e. only a couple of pots this might be ok. Since you bought them you will have to keep us informed.
The 900 - 950 lumens might work for just a few plants. But not a lot nor at a long distance
For your application, no doubt you will be happy and so will the plants. Just watch your temperature.
I am used to hitting my seeds/seedling with the 2 four-foot Fluorescent bulbs rated at about 2,500 or so lumens each.
I personally have no experience with LEDS - so I hope this works ok for you. My experience is just: incandescent (not used any more), fluorescent (T-12 & T-8), compact fluorescent (CFL - the twisted bulbs) [I made my own light with 8 100 watt equivalents - 1,600 lumens per bulb)] and metal halide ( 400 watt units).
I don't spend a lot on the fixtures, but buy better quality bulbs for the fluorescents. For a standard 4 foot fixture one can spend 10 - 200 $ per unit or more. (Some of the new T-5 High Output units are very pricey.)
This is an example of the style I use mainly.
http://www.lowes.com/pd_420865...
