8/10 Monday. 12:05AM FULL RETARD MODE ACTIVATED 8/10 MOnday - looking good needs water will ask Grok: For your Fast Buds autos (RF3s + Mendo Frost) at roughly week 5 in coco, target an incoming EC of about 1.2–1.6 mS/cm (roughly 600–800 ppm on the 500 scale). 8/11 4:30am 550 PPFD is solid for where those plants appear to be. Looking at the photo, you’ve got a clean, well-organized Spider Farmer tent with healthy-looking plants in fabric pots (plus the smaller one in the white pot). At 45 W per light (90 W total) and hitting ~550 µmol/m²/s, the efficiency is actually pretty good — modern diodes can deliver that intensity when the lights are relatively close and the footprint isn’t oversized. Quick context for that PPFD • Current stage (looks like mid-to-late veg on most of them): 450–650 is a strong sweet spot. You’re right in the middle. • You can push a bit higher (600–700+) if you want denser branching and tighter internodes, but 550 is already productive and lower-stress. • Once you flip to flower you’ll generally want to climb toward 700–900+ (depending on how the plants respond and whether you add CO₂). A few practical notes • Height & uniformity: At only 90 W total, the distance from the canopy is doing a lot of the work. If the outer edges or lower plants are noticeably dimmer, you may need a slight height adjustment or to rotate pots so everything stays even. • Heat: 76 °F and 48 % RH is comfortable. With only 90 W you’re not fighting heat. • Dimming headroom. The plants look happy — good color, no obvious light stress or stretch. You’re in a good place. If you want to share the exact model of the lights or the tent size, I can give more specific height/PPFD targets.