Vote Now 🏆 for the Grow Awards 2025!

Chat

By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms

Accept

Recommended

Grow Questions78,600 lumens at canopy, ok for pre-flower and flowering?

78,600 lumens at canopy, ok for pre-flower and flowering?

dauntlessstarted grow question 4 years ago

I have recently received a lumen meter. Measuring 78,600 lumen over canopy, is that OK? For my other grow, does anyone know how many lumens seedlings need (at about 25000 now) ? I can convert from PPFD or PAR. Educate me! Thanks

Solved

Setup. Lighting

likes

DeadwebsiteBoringcommunityanswered grow question 4 years ago

about 250-350 Umol or ppfd for Seedlings. 700-1000 Umol Veg and 1000-2000 Umol. Anything above 1000 umol Co2 is recommended.. The idea that having too much light causing damage is a more of myth or poor idea. The light intensity increases transportation to a point where the plant can not keep up with the amount of available light..

1 like

Complain

Selected By The Grower

Similar Grow Questions

Solved

Está pequeña??? cómo la veís?! (sed sinceros como putas sin dinero) 13horas de luz de media(findes 24/7 y la semana a 8horas mientras duermo) Día 19 desde cotiledones, la tengo puesta con una bombilla led de 470lm 4000k 6w en una caja cerrada sin ventilación!...☝️👵🏻💸

Setup. Lighting

3 years ago

2

2

Solved

Buds touching light Hi peeps.. another question but not so much a big problem... my blue cheese's are coming to the end of there 2nd week of flowering.. just 1 problem I have is 1 of my autos is still growing and is now touching my light I can't higher the light any more what can I do?

Buds. Other

Setup. Lighting

3 years ago

1

3

Solved

Would this be an upgrade or downgrade?Currently using a 400w HPS on a 18/6 schedule for my autoflower. I've just seen this being sold on FB and wondered whether this might be as efficient/better/worse than what I already have Appreciate that it's a 'budget' light, but still looks pretty good 🤷‍♂️🏼

Setup. Lighting

3 years ago

1

7

Solved

Best homemade/purchased seedling care kits?What is the best way to keep humidity and temp constant for my seedlings? My desklamp + heating mat + solocup and dome are too variable. How can I improve?

Setup. Strain - Autoflowering

Setup. Lighting

Setup. Seedling

3 years ago

6

4

Solved

Cheap, discreet lights Do these things work ? Can you grow anything with them like autos ?

Setup. Lighting

3 years ago

12

5

Solved

2 Lampen Ich habe mir von Amazon eine Lampe bestellt wahrscheinlich wird sie nicht die Superleistung haben aber ich dachte mir falls ich mal Blüte mache und ich doch noch ein paar Samlinge habe könnte ich diese trennen. Was haltet ihr davon ? Momentan dient sie nur als Unterstützung

Setup. Lighting

3 years ago

1

1

Solved

Added a light, how far should I hang them both from the girls?I have added a Mars Hydro TS600 to my tent along with the Spider Farmer SF1000 in my 2x2, how far should I move them up away from the plants? I'm guessing I don't want them as low as the SF1000 was on its own which was around 15" Thank you lovely people!

Setup. Lighting

3 years ago

6

7

Solved

100W full spectrum enough for 2 plants in a 80x80x160cm tent. Should I get a 300W instead?So, I bought this light, it's a 100W full spectrum grow light. But I think I might've bought it too hastily. I want to ask you guys before I return it though. Do you think I should get a 300W instead? Planning on growing 2 auto plants ScrOGed.

Setup. Lighting

3 years ago

12

6

Solved

Light intensity in veg - Help needed!I have a 4x4 Tent (120x120cm) with 16 Autos and run a 480W 3.5K LED at ~55 % at a dist. of 40-48 cm (1.3-1.5 feet). Lux: 20-26k. They are tall with up to 14 cm (0.45 feet). What would be the right light density in week 2-3? Ideas? Plz help! THX

Setup. Lighting

3 years ago

4

5

Solved

lights on dim cuz of heat So Ive only got my lights(mars hyd tsw2000) at 50% with dimmer and its almost 29 C during day. Am I worried?

Setup. Lighting

3 years ago

2

1

Solved

Light flashed on Our power did some interesting things during the storm & the lights went on in the tent - I would say they literally flashed on & then off (along with the rest of the house) - during the *dark* period. How concerned if at all should I be about this? Anything I should / could do?

Setup. Lighting

3 years ago

1

1

Solved

Lampenabstand Welchen Abstand würdet ihr zu den Pflanzen zu Beginn empfehlen, die Lampe ist dimmbar. In der ersten Woche mit 25% Lichtintensität starten oder?

Setup. Lighting

3 years ago

4

6

Solved

Gavita Light Dimmer Is there a dimmer for the Gavita Pro 1700e LED grow light ?

Setup. Lighting

Setup. Seedling

Setup. Other

3 years ago

2

2

Solved

Ventilación y Luz en plantulas Me inspiré en McGyver y he puesto un armario improvisado... Cómo de importante es la ventilación en esta etapa de plantula?🌬️ (He dejado la puerta entreabierta por las dudas)🤔 También he puesto otra luz auxiliar..se notará en el crecimiento o desperdicio luz?🔌🔋

Setup. Lighting

Setup. Ventilation

Setup. Seedling

3 years ago

3

2

Solved

Que tiempo tengo que dejar mi ventilar encendido??Puedo utilizar el ventilador de mi cultivo solo cuando este encendida la bombilla?? es decir colocar que se prenda y se apague junto con la bombilla en el mismo ciclo o siempre debe estar encendido??

Other. General questions

Setup. Lighting

Setup. Ventilation

3 years ago

1

1

Solved

I've had two companies offer to sponsor LED lights for my grows, the thing is I don't know which to go with, so has anyone hear been sponsored by Mars Hydro or Viparspectra? if so, what was your experience?

Setup. Lighting

3 years ago

2

5

Solved

Clones and still be 1 grow How many clones can I take from this plant and still be able to do the main plant and the Clones all-in-one grow together? Also how many plants can I do a fishing lie with the 600 watt vivosun LED in a 4 by 4 by 6 vivosun tent?

Setup. Clones

Setup. Lighting

3 years ago

3

2

Solved

So I have 2 different strains ( green gelato and northern light automatic) the plants are not growing at the same pace and I only have one grow light. Is it okay if I hang the light like on the photo? Would appreciate any feedback! Thank you!

Setup. Lighting

3 years ago

2

3

Solved

Hybrid Light (Hps QB)Anyone ever tried hps and led hybrid lights for a grow? What results did u get and what is ur take home message for growers using hybrid lights

Setup. Lighting

3 years ago

2

2

Solved

Temperature Control Help! How do I get my temperature down? I have all 3 vents open & 4 fans blowing. My air duct hasn’t come in the mail yet so I can’t set up my exhaust fan yet.

Setup. Lighting

Setup. Ventilation

Setup. Other

3 years ago

3

3