Far red initiator lumens

How many lumens of 660nm and 730nm peaks should a grow light use as lights on/off buffers? There are countless users but not much data or recipes. Im building for a 2'×3'×5' cab with 15,000 lumens 3000k and 15,000 lumens 4000k. Last bit is probably useless for the far red question, but if they are lm561c diodes, would I gain anything from boosting the 465-485nm range that is weak on these diodes? What about 400-445nm range too? This is at nearly 0% lm flux in the datasheet for the lm561c. Is the technology not really there yet for these blue/purple supplements to be worth adding?

http://www.rapidled.com/far-red-initiator-puck/

The far red initiator puck says it's good for a 3x3 area. Here's a link

RandomHero8913 said:

http://www.rapidled.com/far-red-initiator-puck/

The far red initiator puck says it's good for a 3x3 area. Here's a link

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Thank you for that. I should have thought to see what growmau5 had cooking.

So is UV supplemental been debunked? For 75$ I could fill the 365nm-435nm U 465-485nm gaps

Would probably run them on a timer separately during "noon"

iHearAll said:

So is UV supplemental been debunked? For 75$ I could fill the 365nm-435nm U 465-485nm gaps

Would probably run them on a timer separately during "noon"

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If people are using UV they tend to go for the UVB reptile bulbs. They also do what you're planning, they'll run them for 15 minutes or so during the day when they know they wont be going in the tent or room.

RandomHero8913 said:

If people are using UV they tend to go for the UVB reptile bulbs. They also do what you're planning, they'll run them for 15 minutes or so during the day when they know they wont be going in the tent or room.

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I think,im going to focus on UVA LEDs on starboard PCB and mount 30ct 3w of these diodes on u channel. Just the 365nm-400nm range. Shopping carts are ready. I found some archives on here of some well known members and breeders using UVA and uvb. Then found that black dog growlights did a test comparing UVA and uvb that concluded uvb was not needed for increased thc production. UVA provided increase .


Edit. I just noticed the bias black dog could have since they capitalize on led technology and it currently doesn't allow for inexpensive uvb emittion

monochromatic leds are usually measured in radiant milliwatts, not lumens

CobKits said:

monochromatic leds are usually measured in radiant milliwatts, not lumens

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so, for instance, when browsing digikey and a particular IR LED displays a 35 LM value and another displays a 40 LM value, i can still assume the higher LM is what i should go for right?

again they are usually rated in mW of radiant flux. ive never seen a far red measured in lumens.

higher lm or mw is somewhat irrelevant, look at the staed current as well as the voltage/currrent curve on the datasheet to really get a good comparison

I apologize for redundancy, i wonder what i was looking at that stated this.. anyway.. not what i purchased. i went with 10ct Cree Xlamp HE Red 650nm and 10ct Far Red 720nm diodes. Each 1.9V .35A.

good choice!