On the DEFTX thread, one purchase was SPECIFICALLY to keep geese off of a lake, and, it is reported that it worked great for that.
The DEFTX is a rather bright light (High cd), so, its noticeable in broad daylight....and ~ $800 or so.
The birds that migrate (Geese for example) are more easily spooked. Birds that may be return visitors (They hang around for the season, etc...), will need a negative event to associate with the light, noise, or whatever....otherwise, they learn that nothing bad happens when the stimuli is presented, and they start to ignore it. Same for squirrels, etc.
As for your 3 watt Cree, with 220 lumens, its not about lumens, its about the lux (cd) of the light. The lux is what is perceived as glare, and which can startle the birds. The higher a light's cd, the more startling it will be.
The issue, again, is that you can only startle the same bird a few times before it realizes nothing is associated with the flash, and it ignores it.
You could get a softair gun, which fires plastic BB's that sting but are not deadly, even to a bird unless perhaps an unlucky shot really really close. That can work well, as the sting IS a negative association...and, once stung, they will merely SEE the gun, and run for cover. (Blinding one in one eye is of course a potential problem if that sort of thing bothers you...)
The projected problem is that these means only provide revenge/reactive relief...as you STILL need to wake up and scare them off...and, they then learn they can come back after you close the window again, etc.
An airgun (Pellet for example) that fires a high speed round designed to kill rather than chase off, the critters is a plan, albeit one which is frowned on in some communities, depending upon your neighbor's proximity/projected reaction to that sort of thing.
There are also small cross bows, blow guns, etc....same idea.
In short, w/o getting a wee bit ridiculous, its better to invest in sound deadening measures (Ear muffs, etc) than weaponry in these scenarios, if sleep, rather than revenge, is your objective.
:tired:
