LEDs for plant/moss growth?

[gendor]

While I love those LM301H LEDs for my indoor hydroponics setup, I think they may be a bit overkill for the Pioreactor.

The through-hole LEDs mentioned in the Pioreactor docs were set at around 5% intensity:

Using the Pioreactor for algae growth

Hi @gendor, I’m pretty sure we used these: Super Bright White 5mm LED (25 pack) : ID 754 : Adafruit Industries, Unique & fun DIY electronics and kits However, we had a similar problem where were overexposing our (dilute) cultures to light, and only saw growth when we brought the LED intensity down to ~5% or something (and brought it up from there). I think we also used a higher RPM than we initially expected, like 500.

I’ve tried using an LED similar to the LM301H that’s used in the Adafruit AS7341 breakout board (which can be attached to the Pioreactor window) after someone else reported using it:

Normally on spectrometer led

I would like to use the LED in the spectrophotometer to grow algae. However, the LED is currently only lit during measurements. Is there a way to keep the LED on continuously and have it turn off briefly when taking OD measurements? Any suggestions or guidance would be greatly appreciated! Thanks, David

and it bleached the spirulina I was trying to grow.