Hey Bubbleblower,

Just saw the spectrum graph you got there, I would like to point out to you to be very carefull, it may or maynot be accurate. The chinese have a tendency to lift spectrum graphs from american companies, and thier diodes don't actually meet those graphs.

The first large DIY LED light I built was going to be based on reds and white LEDs, since the whites (I had looked at) had plenty of blue spike (driving the phosphor) and then covered green, yellow and some orange/red. When finished the light sucked, it lacked the needed blue. I took a white diode sent it to someone to spectrographed it's output was a lot different. The blue spike was there but way to the left missing the needed wavelenght. The rest never reached orange/red. After looking around I found an identical spectorgraph, like the one they sent me, for a luxeon white. I have not trusted the chinese since, I thought they would saved me money but in the long run a costly lesson.
oldmac Reviewed by oldmac on . Building LED lights from facts, no theories I was going to post this at the Perfect LED Grow Light thread, but as some of what im going to post was posted 2 years ago on the stickied thread about LEDs and people still continue developing lights from wrong ideas, i think a thread about this topic is largelly needed. The main problem is related to efficacy of spectrums. When the firsts LED experiments at Overgrow, we work on the hypothesis that blue and red light are more effective. It was an appealing hypothesis that promises large Rating: 5