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Here are some stumbling blocks i have hit with comparing LEDS to say...HPS LEDs are rated in millicandellas which cannot be directly converted to lumens (there are approximation equations out there). LEDs are directional, some ambient light can be seen through the back of the board and you...

Heres a picture from day 23, about 30 minutes after setting up the blue lights. The plant liked em, with the top leaves raising themselves from about 12" to 15" within 4 hours. I was planning on doubling the lights but with my current financial situation (yes even at $100 a setup :)) it looks...

The mA rating is how much current you can draw through the led. Whether you have 1 led or 60, 20ma is the TOTAL being drawn through them. Ok,heres the cool part. If you wanted to you could take one led rated at 1.9V and power it with a 12V supply and 1 resistor. The led would drop the...

besthongkong.com is a great place, shipping time is lacking tho ;) best prices ive found so far are at www.hebeiltd.com.cn/?p=led.diode ...reds at 5 cents and blues at 7 or 11 cents or something. The blues are pretty much like radioshacks $4 singles. Its in china tho so there is a min $25...

Day 1 is the day i finished the first panel of lights and got a clone from the med club. Started off at 4". Added second panel of reds on day 8. Days 8-13 got about 3.5" total growth. It gets no other light other than some indirect sunlight whever the closet is open. There has been no...

First time ever growing. Plant is a white widow clone. Currently using 365 635nm high output leds (3000mcd). Power draw is 188mA at 117 volts for 22 watts of power and a whopping $11.56 per year in electricity at $.06/kWh. Red lights will be doubled soon and our blue lights still haven't...