If it is 4x T5 (T5, or T5HO?), or even 4x 65w CF, both should be "ok" for some anemones, especially in a small 15G.. not the ideal light, but good enough for them to survive. My concern is the cloudiness of your tank.. it seems VERY new.. plus the fact your still adding live rock means your tank is no where near the point of being "stable". I really don't mean to sound negative, but there is a low chance of survival. To get him off the glass just use a credit card or something similar to wedge between it and the glass. It will come off with a little effort and not hurting it.. getting them off of rocks is the hard one and I don't recommend trying.