Stealth Inline Exhaust Fans with Speed Controller 6" air cooled tube reflector and L-Glycine support:

and L-Glycine support:

With the light meter below the board in such a fashion that the light reflects off the wall

An easy solution to the problem is to use a fan speed controller

you can simply replace the canister

You get maximum moisture monitoring capabilities with the wall-mounted control to make it all intuitive

Stealth Inline Exhaust Fans with Speed Controller 6" air cooled tube reflector and L-Glycine support:Stealth Inline Exhaust Fans are engineered for serious growers who demand powerful airflow without the noise. A slim, durable housing with an oversized wind tunnel minimizes reverberation, while the sound muffling design absorbs residual hum from high velocity vortex airflow keeping your grow room quiet and your plants thriving. Pair your fan with a solid state speed controller to fine tune CFM output to your exact plant transpiration needs, reduce