I spoke with a Sylvania rep about two years ago regarding making a CF/PC version of the GroLux and they have no plans to make one. Perhaps if enough of us emailed them they may think about it. You can get GroLux bulbs real cheap at "]www.goodoffices.com,
[/url] but you need to buy them by the case of six. CF/PC bulbs are not quite there yet for plants. The ESU-Coralife bulbs have a lot of big emissions in the green and yellow spectrum like the JBJ 6500K bulb. I dont recommend the Hagen bulbs, the emissions are not very strong. They skew the spectral output graph by making it look like high emissions. This website has an article about bulb comparison. Go to AB Reference, Library, Lighting&Equipment and find the article on Light bulb comparison by Ivo Buska. It has a lot of spectral graphs for many bulbs - an excellant article. Pay attention to the emission rate listed on the Y axis.
You can also try www.lighting.philips.com
and their importer www.aamsco.com
. Other sites to purchase bulbs are www.ahsupply.com
(they have a 55 watt, 5500K, 91 CRI bulb for ~$19.00 US), www.brite-lite.com
(Canadian site but must buy in bulk) and www.hellolights.com
. Hellolights say they manufacture their own bulbs but I dont think so. I think they are ESU bulbs. There are not too many manufactures for fluorescent bulbs.
Remember, like Roger says, you really dont need a 'plant' light if it has strong enough light in approx. the right spectral output. You just need to avoid those that have hugh amounts in the green and yellow areas. A bulb with a high CRI will have good enough emissions across the spectral output mimicking sun light.