tag:blogger.com,1999:blog-3563375693893858995.post7405700751494042744..comments2023-10-11T04:34:10.280-07:00Comments on Musings of a slowly rotting mind…: In praise of LEDsTom Hurleyhttp://www.blogger.com/profile/02406594538384486447noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-3563375693893858995.post-166112028582369272010-08-23T10:41:21.737-07:002010-08-23T10:41:21.737-07:00I too have wondered about the blue-ness of white L...I too have wondered about the blue-ness of white LEDs. Maybe the extra blue is leakage from the blue excitation LED, and they can't be bothered to correct for it.<br /><br />Here is an LED desk lamp that intentionally produces warm-colored light to simulate an incandescent bulb (also available with daylight color balance): http://www.konceptech.com/highpowerzbar.html<br /><br />Can be purchased at amazon.com, but not a cheap as the one you found at Costo!Pete S.noreply@blogger.comtag:blogger.com,1999:blog-3563375693893858995.post-90133336136101789432010-08-23T10:03:56.726-07:002010-08-23T10:03:56.726-07:00Nice comment, Pete S. I am wondering why all the L...Nice comment, Pete S. I am wondering why all the LED makers are making the light cool in color instead of warm. Simply changing the phosphor would change the whiteness of the light. Compared to incandescent and even many compact fluorescent bulbs, white LEDs tend towards blueness.Tom Hurleyhttps://www.blogger.com/profile/02406594538384486447noreply@blogger.comtag:blogger.com,1999:blog-3563375693893858995.post-44767208816532529672010-08-23T09:45:52.167-07:002010-08-23T09:45:52.167-07:00An interesting fact about the yellow dot you see i...An interesting fact about the yellow dot you see in a white LED is that it is a fluorescent material. An ultraviolet or blue LED behind it excites the fluorescent material which in turn emits the white light.Pete S.noreply@blogger.com