Jose, Thank's for the additional information. I wonder about the graph of the SPDs though? The width of the bar does not say much about the shape of the light, which should be a little more "spikier" that what they show? Still, I'd like to find detailed information on these lamps. Best / Roger -----Original Message----- From: José Ángel Bueno García [mailto:jbueno61@gmail.com] Sent: August-05-12 1:25 PM To: Roger Breton Cc: colorsync-users@lists.apple.com Subject: Re: "Hardware Store Tubes" Hello Roger: "Helps With Calcium Absorption.", and "All Birds indoors Need Some Type Artificial Lighting." CRI 96, 95 or 98 for 5000, 5700 and 6500º Kelvin respectively. And a graph of SPD http://www.mmlights.com/Lumichrome%201XZ.html As Dan said, the Philips tubes are cheaper. Jose Bueno