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ficus needs at least 1000 lumens to grow.
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Yeah, that would be the bare minimum, but just for your reference that equates to very dense shade outdoors when considering light from a plant's point of view. I have a light meter, which registers light on a scale of A through H - H being full daylight. A 3000 lumen 4 foot shop light doesn't register at all, with the meter 1/2" away from the bulb, and an 8000 lumen 8ft florescent registers around 'B' when held 1/2" away.
Saying that, your lamp is definitely an improvement over nothing, but it is still a very weak light to try to grow something with indoors. You will, in the future, have issues with overly dramatic apical dominance and long internodes. If the desk lamp is the only thing you have space for, I'd try to find one of the huge compact florescent bulbs - I've seen them up to 2000 to 2600 lumens, though you'll probably need a socket extender to put them into a desk lamp.
-Centaura