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Question: Does this light have the ability to work with an AC plug? I.e. does it need to battery operated or can I plug it into the wall? Please advise.
Document: This light is what I needed to shoot video and stills at night and in very dark areas. It's bright, it weights very little, the illumination is even, spread on the subject and controllable. You can use AA batteries or a rechargeable battery. Easy to use in daylight as a fill or main light on the camera or it can be separated from  the camera positioned at an angle elsewhere.
Very bright and nice light. The unit is not heavy and easy to handle. The plastic components are a little bit fragile, but if you need something light, there is no way to have different material than light plastic.I recommend the product.
This is a nice compact light. It is brighter than I expected, but that's a good thing. I use it in conjunction with my studio lights for still work, and I've also used it as an on-camera video light. Don't expect to shoot a wedding using this as your only light source, but it is a very handy tool to have in your bag.
I work as a Skate Filmer and we use this to light up spots at night. I use it with my handle on the hot shoe mount and hook it up to GoPro Mounts on stairs, ledges etc for creative lighting. A must have for every skate filmer! Order came very fast and was exactly what I needed.
I purchased this because it was cheaper than replacing just the bulb in my existing on-camera light. The unit is very light (less than a pound) which makes is nice for mounting on the camera. The really cool feature is that it will accept 7 different types of batteries. I happen to have a small 800 mAh battery from an old Panasonic camera and it worked great for over an hour of on-time. The light throw was about 12 feet, so more than enough for interviews. The cons with this unit is that it's made of cheaper plastic so you can't throw it around too much.
I got these for a video job but use them for work lights as well. With high output rechargeable batteries they last a long time.
I have the neweer version also and I use my lights daily. They get abused and this one is much better by far. Feels sturdy, feels like the battery life last longer and even though it's a little taller, it doesn't feel heavier.
!adjustable brightness form low ( good for light fill) to high blinding light.160 LEDS is more than enough. good spread.but again, i use this for camera so when i et it to high, the human subjects squint their eyes. hahaha. so i lower the setting to make a good picture. brightness indicators are red LED lights at the backBattery : 6 AA battery. I use Eneloop. long lasting. it has another source of battery (from another model) but i dont use it. NO DC INPUT...it has a battery charge test that shows how much battery you have.the same LED that shows the Brightness are also the charge indicatorsIt has 2 diffusers, the white (which is no different from no diffuser, and an orange diffuser that brings out flesh tones).
Its amazing for the price. Its so much better than a led light I got a year ago for $100.
ok not only are these bright enough but there is a button where you can adjust the brightness...Great for the money I think  a photographer should have this light no matter what.
Answer: As Edward says, there is no DC input jack on the light. But I don't see why you couldn't wire one in. I've thought about doing it myself, to save the weight of the battery on the camera. In terms of light output and color temp the light is very good.