This has been discussed in many forums, and in just about all of the brands.

While I've not gone to the length of buying my own lamps, I have bought brighter bulbs for hotel rooms before.

Some of the brands (Marriott) have even lost focus so much that they've stopped putting desks & proper chairs in their remodeled properties! I'm in my 30s and wouldn't want to spend 8-10 hours sitting on a sofa or bed getting some real work done. And no, I'm not going to hang around the lobby's "collaboration space" to get work done either -- my work won't allow it, nor would I want to be working with client/case data in public.