Philips leads many areas of lighting, and I appreciate a business that knows to specialise and do well in their chosen area.
I have been using a Philips 3520 Wake Up Light for over a year now. I find it very gently wakes me up, especially in winter, and suits my rhythms well. I hate sudden loud alarm clocks and this solves that problem well.
I recently bought a clever Philips Hue kit to play with and compare.
Both are high efficiency LED based units with some clever tricks. This should give you some comparison information.