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As the title says. I suppose they do but I am a noob.. Interested in PWM dimming

Diyleduk Todogrowled.com

Thx i do appreciate your suggestions. Unfortunately there is no chance I can modify anything atm but I'm used to grow in these conditions: hot as hell in summer and freezing cold in winter. + ceiling is at 4.5ft lol my back hurts! I can just try to move air though the door for some hours...

Attic with no windows here lol

You re right about heat, 1 watt = 3,41 BTU (HPS has far more far red than leds.) You need less watts to have the same light output. less watts = less heat

no

Wanna stay cheap? Open amazon and get a viparspectra or a Mars Hydro panel, both 300 version are under 100 euros. They are plug and play, no need to diy

Can't you just use 1 thread instead of 25 different discussions about the same topic? You can use the search tool to get all the answers but we are also willing to help you if you open a specific thread. Spam is not needed

@Stephenj37826 what is your thoughts about UV-A and UV-B supplementation?

This is damn right... I grow inside a attic and it is quite impossible for me to complete a grow without problems. Damn cold in winter and hot as hell during summer. I now think VPD is probably the most crucial variable to keep under control.

Why don't you get a blue led? Like citizen cobs

@CobKits could help you

Are the CXB3590s chepar now? Why don't you get luminus or bridgelux cobs rather than cree?

some botanicare products are available in the UK (not in the EU) but they are discontinued

Noob here. I always wanted to try vaping to make my lungs life easier but I do not know how to move. I assume you vape your dry buds but is it different than using some kind of e liquid?

Wanna share the seller name?

Going to use this to flower a 2x3x3 tent at 120-150w I hope I can keep plants close to the fixture to offset the low wattage

I am using the same chart Randomblame posted that is why I would like to implement a ir temp module to check leaves temperature. I am also interested to understand what difference the lack of IR wavelenghts makes compared to HPS

http://ledgardener.com/build-led-grow-light/

I love it. That is what I would like to do with added remote arduinos (esp8266/nodemcu) to monitor and send data to a Pi through MQTT. I like the HTU21D for temp and humidity monitoring, the DHT22 isn't enough accurate. What are the 4 red leds on the board? Did you make it?