Start My Diary Login Sign Up
LadyGreen started grow question 5 years ago
Is 153w cfl/led lighting enough light to flower one plant? What is the minimum I need?
First DIY cabinet
18 weeks
First DIY cabinet LadyGreen
indica mystery bag seed
43 comments · 5 years ago
Week 8
Techniques. Defoliation
Experimentgreen answered grow question 5 years ago
So i used cfls in the beginning to get my plants big enough for the outdoor season and as seedlings i started with 1 60 watt daylight bulb, and slowly i increased it based on the size of the plant until i had 3 100 watt bulbs (daylight). I found my plants were stretching a lot. However with a good box setup, reflective mylar etc, i know you can get reasonable results with like 4+ 100 watt bulbs otherwise have many lower watt bulbs scattered at various heights. However you can make as few shadow pockets do. Possibly begin the grow with lights above and as the plant grows have some low down and the light above. Growing gets expensive, so just go off what your plant tells you, if stretching, add more bulbs. I dont see why the 153 shouldnt be ok for now. Ive seen good results with both the store bought led/cfl bulbs so i can only say experiment.
Nutria answered grow question 5 years ago
Hey there, just my 2cents.
Are 150w enough? Maybe. Rather than using the watts per plant you should look at the w/sqft since you can fit how many plants you want in a given space. You should aim for 70-80w/sqft.
If you want to learn a bit more... A better metric to judge your grow light is PPFD and it is expressed in μmol/m2/s. To support a optimal grow during flowering a PPFD between 600 and 1000 is needed. ( )
We want to keep it simple so we stick to luminous efficacy (lumens per watt) and energy efficiency (% of the watts drawn that are converted to useful light rather than heat):
- CFL bulb - 60 lumens/watt - 8% efficient
- LEDs bulb - 90-120lm/watt - ?? %
- HPS (medium power) - 100-120lm/w - 20%
- Quality (white) led panels - 180-200lm/w - 40-50%
There could be even more to be said about costs.

I can't see any reason to get CFL lighting in 2018 rather than led bulbs that:
- have higher lm/w
- last longer
- do not contain mercury!
- emit a better spectrum
- don't waste light in a 360 radius
Many producers are going to stop CFL production, like GeneralElectric.
Removed answered grow question 5 years ago
Stay away form CFL. LED bulbs are MUCH better. I would know, I use them. You will need between 30 to 40 real watts of LED per sq ft. For 1 plant, you need 1 or 2 sq ft (I grow 2 plants in a 2 sq ft area, so 1 sq ft per plant).
So for 1 plant use up to 40 watts of screw in led bulbs, with the dome removed. I recommend using Phillips bulbs, they work real good. If you do want to use CFL, you will need 3 to 4 times
the amount of watts, so yes 135 watts of CFL will do, for the same result that 40 watts of led watts will give you. Check some of my diaries if you want to see how they work.