Reddit mentions of Lighten Up! - $19.95 Uses Your Own Lamp.

You should look into a Dawn Simulator. I bought this one a month ago and so far I have really liked it. If nothing else, I haven't over slept since I've had it.

Not the same as OP's but this one has a dimmer function and isnt too expensive... I used it for a couple years and it worked very well till it died... obviously not an amazing build quality unfortunately but it beats spending $200. most of the reviews are positive too so maybe mine was defective.

As others have suggested, light is the primary way to wake them up, but I feel technique matters here. Our bodies are designed to wake up in response to light, we have special receptors in our eyes that are tuned to the blue light spectrum present in natural light. However, if you flash on the lights you are simply asking for them to flip over or cover their face, what you need is a sunrise simulator. This will gradually wake them up over the course of 30-90 minutes and will be much more successful. Here is one that I use that works with most lamps (you will need an incandescent bulb).

http://www.amazon.com/gp/product/B00AXL8Q02/ref=wms_ohs_product?ie=UTF8&psc=1

Along this same vein, if you want them to go to bed earlier, try turning down the lights the same time every night to promote sleepiness. Devices such as iPads, TV's, phone, etc emit blue light like it's their job. Make a rule like "no screens after diner".

For more tips, research sleep hygiene. Our internal body clock (the Circadian Rhythm) is controlled by many ques, primarily light, but also routines, exercise, food and disrupted by many of modern world norms. A sudden wake up is neither healthy nor successful for people that are not biologically early birds. Good luck!

Probably not. I think this means you're still tired--also what lumen output or wattage is the light that hurts your eye?

If I wake up earlier than I want to, I find the dimmer outdoor natural light much more pleasing than bright incandescent light.

So if you're using even a 60 watt bulb then it just may be that it's not a natural amount of light at that time.

I recommend $10 Lutron lamp dimmer that plugs unto the wall or a $40 300 watt capable device that brightens your lamp lights in the morning instead of instant brightness.

https://www.amazon.com/Lighten-39-95-Uses-Your-Lamp/dp/B00AXL8Q02#productDescription_secondary_view_div_1487867999063