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Lighting & Environment

LEDs, PPFD, VPD, temps, humidity, airflow and dialing in the tent.

12,088 threads · sorted by activity

T

Pinned Dialing VPD in flower — target ranges that actually worked?

by TentLifeTina · 1h ago

Best answer

268replies

C

How far should my LED be from the canopy in veg?

by CalMagCarl · 4h ago

Best answer

104replies

D

PPFD targets by stage — what numbers do you run?

by DWC_Dana · 7h ago

Best answer

152replies

F

Tent hitting 30°C lights-on — fix without a new AC?

by FirstGrowFiona · 1d ago

Best answer

88replies

L

Hot Humidity too high in late flower — bud rot paranoia

by LivingSoilLuke · 1d ago

119replies

T

Lights-off temperature drop — how much is too much?

by TentLifeTina · 2d ago

Best answer

64replies

A

Carbon filter + inline fan sizing for a 4×4?

by AutoflowerAl · 2d ago

71replies

D

Hot CO2 in a hobby tent — worth it or a waste?

by DWC_Dana · 3d ago

96replies

C

Cheap PAR/PPFD meters vs the phone apps — accurate?

by CalMagCarl · 4d ago

53replies