Im pretty sure it wont hurt the plant to stay in the window shelf for a few days (might just be like a few bad/cloudy days for a outdoor plant)
but yea get the CLF asap. as I dont belive you will see mouch grow in the window alone ..
if you have a lamp with a small CLF hang it over it or place it beside it so add a littel more .. a 23W would be fine untill you can get your 125W ..
and yea if you have the money .. and have to order them anyway .. get two .. one 6500K and one 2700K and use boath all grow ..
or get the 2700K and use them small 23W CLFs (5000K) for sidelightning ..