sunrise simulation lamps: which light is brightest?

Hello, I am looking to buy a sunrise simulation clock/lamp and am trying to find out whether the Lumie or the Philips will be brighter. I know the Philips HF3510/01 and HF3520/01 models will reach 300 lux, but I can't compare this to the Lumie (any model) to make an informed choice. Since these clocks are quite expensive I was wondering if someone here could help me out, please? I find it very hard to wake up in the mornings and I'm hoping one of these lamps will help.
The other features like the sounds and radio are not important to me -- only the light intensity matters.
Thank you for your time!
Stella