Check out superbrightleds.com. They have all types of LED lighting from vehicle, boat, interior & exterior household lights and everything in between
Are those Caucasian Shephards? Yours?
Yeah, you have to feed them, but if you had those, you wouldn’t need shotguns, or lights, or even locks.
Lighting, dogs, security doors, good locks, alarms, all are part of the security mix, but the armed human is the actual stopping force to a serious attacker.
When I start subtracting from the list of what I want in security layers, the last item, would be my personal weapons and capabilities.
Fair enough, but those aren’t your average doggies.
Set up an early warning perimeter detection too! http://www.ebay.com/itm/Voice-Alert-System-6-Wireless-MOTION-Detector-Driveway-Pool-Alarm-with-6-Sensors-/271441028323?hash=item3f332564e3:g:xkkAAMXQrhdTQfPH I’m not saying use this system, this is just an example. They have cheaper and more expensive systems. Mine run on a 9volt Lithium Battery wireless system. Research it! It will buy you precious time!
Another good suggestion. At my parents they have an alarm At the end of the driveway which detects when vehicles come in the drive way. It’s been a great thing to have and has alerted us several times of possible thiefs, which is then when the shotgun comes into play.
I have looked at those driveway sensors. My driveway is almost 1/2 mile long and it really doesn’t look like an entrance to a house. It looks more like an entrance to a deer lease or something like that. No one has any business showing up at my place unannounced so anyone that goes there is very suspicious. I’ve taught my wife to answer the door with gun in hand. The old lady that lived there before me used to have a .45-70 hanging above the door, but for the most part, the only thing that bothers us out there are those sneaky little raccoons trying to get into the trash.
You set them at different height’s and distances around your house, not only your driveway? You can crisscross them at different heights to double the coverage. Remember when they come, it will be at night, when your most vulnerable or when your sleeping? You can use them also for setting up a perimeter around your campsite, like when in bear/cougar/wolf country. Some people like to know when something is invading their “Personal” space! 
Solarforce l2m with low volatge one mode drop in. Works on 18350, 16340, or CR123 batteries and will put out about 300 lumens. It’ll be bright enough to shine down a short driveway, but not completely blind you indoors if your eyes haven’t adjusted after waking up. I suggest staying away from tape switches since they are hard to keep on with recoil and require constant pressure. A forward clicky switch mounted where you can bump it either momentarily or permanently on with your finger works great. One mode is crucial, since you don’t want to be fumbling with your light when you need it. Whatever you end up with make sure you test it as much as you can at the range (or on your back 40 depending on where you live) before trusting your life with it.
Sorry to hear about your neighbors, hopefully whoever was responsible will be brought to justice.
EDIT: I wanted to also mention that I chose to clamp only on the tailcap of the flashlight allowing me to unscrew the light without having to open the clamp. It’s also worth mentioning that it isn’t as awkward to hold as it looks, that’s just because of how clumsy I am with a camera. Hold on to the gun and mount your light wherever your hand naturally falls.
Just my opinion. But first step practice firearm safety at all times. Once a bullet leaves that barrel you can not take it back. Know where it will wind up getting lodged. Know what’s beyond walls.
If you own a pistol that is your honest best bet. I am unsure how large your house is…. But if they can get within 15 feet of you. A shotgun is not your best bet. If they are within 5 feet it is too easy to disarm you of your own shotgun. A pistol and an off hand light in my opinion is better for close quarters. It’s better to point a flashlight at a friend family member or pet than a loaded firearm with light strapped. Odds are it will be a family member you hear. Safety first.
If you hear something and go look with a shotgun, if they are around a corner and get a hold of your barrel , the situation can go the wrong way quickly. Much harder to grab a pistol from someone.
Odds are most will run after the rack of chambering anyhow.
You can buy home defense shells, I think they have 6 00 buck shot bbs an a 44 cal lead ball.
Pistol is lethal point blank to over 100 feet. And much more difficult to take from you.
What ever you decide practice practice practice!
Also if weapon mounted be sure the light can withstand recoil so it does not turn off from recoil. And getting bumped. With an off hand light that is not as crucial.
This is all just personal opinion, you do what you feel is best. Just practice safety
Safety is key when firearms are around. Know your target and know what is beyond the target! BE careful and be safe. I hope you never have to experience the need to defend your home.
Good advice. There isn’t anything beyond my walls for about a 1/2 mile and when I go look with the long gun I do usually have a .45 holstered. Flashlights are ok in hand but if you have to grab it real quick its a pita to be fumbling for both things at once. I do love the sound of racking a 12 gauge but hope it will never be used on a person. A light mounted on it will also be good for hogs, coons and any other varmint unlucky enough to cross paths with me. 
Armytek doberman light with this mount http://www.elzetta.com/zsm.html Armytek has mode changing when you loosen the head a 1/4 turn then you scroll through the modes. With the head screwed on tight it only has one mode and that’s the way it should be used. Pop on a multi mode light and you’ll get moon mode when that’s not good. I’ve dad mounts move under recoil. A dab of silicon spread out under the mount then clamped down after it drys tends to keep the mount in place under even the harshest recoil. With a tight hot spot you have a good idea of impact area.
I would say you would be good to go with an armytek I have a predator, it is a great light but the threads seem to have worn out so recoil can change modes on mine unless I put it in group one head tightened.
I have snorkel in fresh water with both lights.
I have used their head light wizard pro daily for couple years now. Very good durability.
Seems to me you will have it pretty well covered. For those pesky critters to the thugs.
I’m so sorry to hear about your Friends. This is truly Tragic. This is what happens when a Nation has no border. I will agree with Pflex pro or similar. Get something that has been built by someone in the USA. I spent 3 weeks on the border in the summer of 2014. We have no border enforcement, everything put out by the Press on this issue is 100% propaganda. The Criminals that run Washington have the Blood of Thousands of dead Americans on their hands. God Bless you.
I agree with JakeDjanitor that you seem to be on top of everything, you just need your shotgun flashlight, but we do love this topic.
I almost mentioned the need of carrying your pistol with you also, but you not only do that, you strap on a .45 when you go checking things with your shotgun.
Do you carry extra shells with your shotgun?
Claim “FALSE”: The modern image of Santa Claus was created by the Coca-Cola Company.
Oh the Horror
Is nothing Sacred?
I do have one of those.
An old shooting buddy called that his “burglar alarm” because it is a unique sound which everyone recognizes instantly and it will alarm any burglars who hear it J) It seems you’ve got things covered well enough now and we all hope the creeps who killed your neighbors get the justice they deserve.
Prevention is always the best solution, so early detection devices, visible and hidden wireless cameras that download to a hidden storage or the internet with signs noting that, things making it obvious the residents are armed, perimeter and dwelling hardening- all this will help with prevention. But again simply having a dog or few of adequate size will do as well or better. Their inherent “pack” mentality bonds them protectively to you and your family and it takes no special breed to get that. But it does require that you bring this out of them along with getting them to understand who is friend and who isn’t. Only 4 people other than me can enter my yard unless I am with my dog there (actually it’s her yard with my house in it). Anyone else who tries will have to disable her first and that won’t happen quietly bringing my neighbors into the big picture. Dogs and humans were meant to be together so take advantage of that, and add some 4-legged friends to your life. Best all-in-one crime prevention device there ever will be
Phil
(Adding one more thing I learned from Marine long ago: A gun which is not available when you need it is the same as being unarmed)