Chat

By continuing to use the website or clicking Accept you consent to our cookies and personal data policy. For details please see Privacy Policy

Accept

Recommended

Recommended

Grow QuestionsLight help please :)

Light help please :)

AutoZone420started grow question 4 years ago

I’m trying to figure out the optimal height to hang my KingLed 1000w full spectrum at for seedling, veg, and flower. I feel like part of why my plant was is so small is due to incorrect hanging of the light but idk

Solved

Setup. Lighting

like

ijustdontgiveafanswered grow question 4 years ago

If you really want to be correct, it'd be best to invest in a par-meter.. this way you can measure the intensity and adjust it according to the state of the plant. While the really good sensors are expensive (like the Apogee), Shane from Migro tested a cheap 30-bucks unit from Amazon and created a "conversion factor" that can be used to calculate the PPFD value for a given light-temperature (i.e. 3k, 3.5k etc) to match his Apogee. He said in his video, that up to 1000PPFD this specific unit was quite accurate, so I think that could be a good investment (i got it myself as well). I suggest checking youtube for his video on the Migro channel..

1 like

Complain

Selected By The Grower

Greenbean420answered grow question 4 years ago

Throughout the cycle i try to keep between the 14inch-20inch mark. Place your hand on top of the canopy for a couple of mins, if ur hand is too hot, then your girls will be👍

1 like

Complain

Similar Grow Questions

Solved

Lights Hi guys! What light should I get? The viparspectra xs1000 or the marshydro ts1000? I intend to grow in a 2x2 space. Would the viparspectra be as bright as the marshydro because its more efficient?

Setup. Lighting

14 days ago

3

Solved

best LED light 4x4 Best LED grow light for a 4x4 Could anybody please suggest which LED light they would recommend for a 4x4 grow. Willing to spend around £500 maximum as I really want to invest however most videos on YouTube are marketing their own. Really appreciate your advice. Many thanks!

Setup. Lighting

a month ago

24

12

Solved

Lux Meter and Hydroponics Who has experience with using LUX meters to position lights in various stages of hydroponic growth. I feel I am giving mine too much light, based on the readings, but don't want to pull them back. Currently 10" from the plants.

Setup. Lighting

a month ago

6

Solved

MarsHydro FCE4800 for a 4x4 grow?Is the MARS HYDRO FC-E4800 480w the best option to use for my 4x4 tent. Will be doing 9 CBD auto flowers as a hobby. Would you suggest any alternatives? Really appreciate all the advice and will be making my purchase with the advice you have all given me so far!

Setup. Lighting

a month ago

1

5

Solved

Is this MarsHydro light the best choice for my 4x4?Is the MARS HYDRO Smart FC-E6500 Bridgelux 680w the best option to use for my 4x4 tent. Will be doing 9 CBD auto flowers as a hobby. Thankyou community!

Setup. Lighting

a month ago

2

2

Solved

MarcoCasanova00

Too much light or PH imbalance?I dont know, something strange about the color, the spots on the leaves maybe? suggestions accepted. Maybe I need to add a fan ASAP, or let more air into the tent? Dimmer is sset to 20% 25% , maybe I should give more light? or maybe less?

Leaves. Color - Yellow

Leaves. Color - Pale

Setup. Lighting

a month ago

2

2

Solved

what ppfd for 20/4 autoflower?Just bought the FC-4800 and before this I had always measured my light using inches away from canopy however I want to learn how to use the light using PPFD. I have found average measurements online but what should I aim for for a 20/4 autoflower schedule please? Thankyou!

Setup. Lighting

a month ago

2

5

Solved

What lamp to start growing (cheap)?I want to grow 1 or 2 plants but i cant find a cheap lamp for my preference. I ordered Northern Autos and DoSiDos Auto. Im planning to plant one of each. I´ve got 36cmx36cmx140cm im growing without a box i will try building it myself. is it enough space for 2 plants and wich lamp

Setup. Lighting

a month ago

13

10

Solved

Light intensity My plants have been looking sad for a couple weeks. Tried everything then the other night I turned my light down to 40% giving a DLI of 28 they perked right up with 24 hours. I have now put it up to 60% giving a DLI off 39 will this be ok or should I keep it low. Week 2 flower.

Setup. Lighting

2 months ago

1

2

Solved

MrShortTermMemory

Lighting cycle for VEG stage. Is 24x7 OK?Hi, Should I use the VEG lights 24x7 from the time I plant my seed until it's ready to bloom, or would something like 18 hours on and 6 hours off make more sense? Is there a "best practice" for veg lighting? It has worked for my first 3 grows. VIPARSPECTRA 600W LED Thanks, Mr.STM

Setup. Lighting

a month ago

7

7

Solved

Bad idea?Will a mars hydro TS1000 be too strong for a 60x60x140cm tent? I have been using a TS600 and TS1000 in tandem in a tent 4x too big for the light level, I have been growing strong and tasty buds but with low yields so downsizing my tent size to maximise the light.

Other. General questions

Setup. Lighting

3 months ago

3

3

Solved

Got a Mars Hydro TS600, will it do alright?My plan is to grow only 1 plant, in a 40x40x120 tent. I know the tent is pretty small but hopefully i can do some training on the plant to grow wide Will the light do until the end? 100wats, but no light dim possibility. Currently growing seedling at 13 dli at 60 cm

Setup. Lighting

3 months ago

1

1

Solved

Scott_Tennerman

What kind of light level (lux) during the dark cycle will cause my plants to herm in the flowering stage?What kind of light level (lux) during the dark cycle will cause my plants to herm in the flowering stage? I am growing in my bathroom (no windows) and I am worried about external light entering. My bathroom has 3 LED (30W) bulbs in, I have removed the 2 closest to my plants.

Setup. Lighting

4 years ago

2

2

Solved

Best LED Light set up Hey lovely peeps, So looking at my next set up to be LED, few options out there so wanted to see what ppl can suggest, needs to have built in fans to help with heat from the light, can go up to 1000W but not necessarily needed, 5ft x 5ft grow tent Thanks again for thoughts D

Setup. Lighting

Setup. Other

4 years ago

2

2

Solved

Switching to bloom nutes and photoperiod changes?When should I start giving bloom nutrients and stopping the veg nutrients? Also can I switch my light cycle to 24hrs to increase the temps and maximise my yield? Or will this mess with the plants?

Setup. Lighting

Feeding. Schedule

4 years ago

4

3

Solved

Replace my hid Hi guys I'm looking for a good led lamp to replace my old 600w hid For about 100-150 €.. what do you recommend?

Setup. Lighting

4 years ago

2

3

Solved

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

Setup. Lighting

4 years ago

1

1

Solved

light cycle once a photo period plant starts flowering can i run the lights like an auto 18/6? or does it need to be 12/12

Setup. Lighting

4 years ago

2

2

Solved

LED height recommendations - 120w Kingbrite Hi guys, I need some recommendations for my LED height. I'm running a Kingbrite full spectrum 120w bar light at 32" from my pots at 50% power and I'm worried my girls are stretching. Can anyone give me some advice please? It would be really appreciated :)

Setup. Lighting

4 years ago

1

4

Solved

Spider Farmer SF1000 or Mars Hydro TS1000?What would you recommend between Spider SF1000 or Mars Hydro TS1000? Both seems pretty similar, which one to chose? I’m planning on growing two autos at a time/or one photo, 70x70cm space.

Setup. Lighting

4 years ago

5

6