Check out Viva-Lite -lamps. They produce "Full spectrum light", which is quite frankly just awesome.
I'm not affiliated with Viva-Lite, just a happy user. Having 26W model here, it's maybe bit cold (5500 K), but still reproduces colors accurately.
edit: At least my lamp has quite long warm-up time. I haven't actually measured it, but I think its far longer than 10 minutes used in the article. Thats a major downside in ESL.
I'm not affiliated with Viva-Lite, just a happy user. Having 26W model here, it's maybe bit cold (5500 K), but still reproduces colors accurately.
edit: At least my lamp has quite long warm-up time. I haven't actually measured it, but I think its far longer than 10 minutes used in the article. Thats a major downside in ESL.
edit2: I actually forgot to add the link: http://www.viva-lite.com/