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WARNING – Before You Invest In LED Grow Lights…


Before you invest your hard earned money in LED grow lights do your homework and make sure you get a great light from a reputable company. Otherwise, you might get stuck in the middle of your grow with a ruined crop and light pocketed. There are a few critical things to look out for when shopping for LED grow lights.

marijuana led grow light


Be careful of companies that promise long warranty terms but have only been in business for a short time. I see companies offering warranty periods that are longer than the amount of time they have been in business. This should be taken as a serious warning sign. If the company hasn’t been around long enough to know the defect rate of their product over the life of the warranty period, they may not be around when you actually need to use their warranty several years down the line. In the last several years there have been numerous LED companies that have come and gone and the main reason they go out of business is because they get overwhelmed by service requests after a few years of being in business. Look for companies that have been around at least 5 years so you can be confident that they will be around in case you need service when you need them most.


Any non-perishable product should have a return period during which you can get a refund. Ask to see the company’s return policy and read through it carefully. Make sure there are no restock fees. You should be able to return your lights for a refund for at least 30 days after you make your purchase. In case you change your mind or have something come up in your life, you do not want to be penalized for your purchase by not being able to return. The return process should be easy and straightforward.


If you live in the United States, you want to do business with a company that is located in the United States. It sounds pretty obvious but it is critical and worth mentioning. You want to receive your item quickly and you need to be able to return the item easily in case you want to return or have a service request. Ask anyone who had to send a light overseas for repair and you will hear a nightmare story. I have read many of them on the forums and do not want to share in the experience. US based companies have a culture of customer service and will generally go out of their way to keep the customer happy. This is not always true of international companies who may have a completely different business culture.


Before you make an investment into your growing business or hobby, make sure you know who you are doing business with. Make sure the company is very reputable and provides top-notch service because if you ever have an issue with your lights you want to be certain that someone is there to take care of you. There are a handful of good companies selling great grow lights but unfortunately there are many more companies that will join the LED boneyard in the years to come. Choose carefully and enjoy the benefits and joy of growing indoors with LED grow lights!

A Cooper


About Author

Johnny Green

Johnny Green is no longer with The Weed Blog because he was caught redhanded stealing money from TWB and using black hat strategies to inflate pageviews to try and lure unsuspecting investors. We hope Johnny has learned from his mistakes and wish his family well.


  1. Make your home as like nature

    The LED light’s direction is not like the incandescent bulbs, rather they spread the light more spherically.They ensure you the correct brightness and appropriate temperature in order to optimize the process of photosynthesis.

  2. James Arischen on

    I designed my own lights to undercut the main sellers in America… Going to be starting my own company. My results are better and I only use diodes the plant can actually take in. High end panels include spectrums the plant reflects….. Fun huh? I can’t give out my design though. None have gone out and still work amazing. About 18 days in to flower on some and there’s already connected buds that are quarter size. Usually don’t see flowers forming until now or 3 weeks in. The company I make through actually has a 7 to 1 ratio panel that’s basic… Red to blue spectrum. Just fine to use and,has warranty. 300w panel on Amazon is cheap. Galaxyhydro. Work just as good as the spendy ones. Control your room and give plants a 3rd of,nutrients

  3. I have a couple of questions because I like your response & I’m thinking of trying a grow myself. 1) Where did you get these lights? 2) What specific frequencies did you specify? 3) Did you see a high failure rate w/ these LEDs? Is there any other advice that you can give me for my 1st attempt? Thanks

  4. It’s not a matter of of are LED’s good or bad. You need to compare the different types of LED’s.
    Chip on board and multiple chip on board LED’s can work well if you have the right kind.
    Go on growthstar’s facebook page to see their comparison pictures of mcob vs HPS

  5. James Arischen on

    I designed my own grow lights….. 11 band spectrum. Rooms naturally stay at 65 degrees and 70% humidity for veg. Only need a dehumidifier for flower in the room. Also, height regulation is bogus. I went from seed to a little over 2 ft in 2 months with LED. Plants are way healthier under these as compared to MH and HPS. In flower now. Used these on a already flowering plant and double bud size in 4 days and tripled trichomes and not even kidding. But I did design this with specific NM. Also, cost me a fraction of an American brand on the side who has wavelengths the plant blocks out. 12-18 inches above canopy and It’s perfect. Waiting on it to be done to see results of yield. Expecting similar results per watt, possibly more but with a much better product(testing phase so who knows). Be in mind that LED panels don’t put out the actual listed wattage…. sometimes puts out 60-70% of it’s listed wattage. But it’s why they last 50k or more hours. Trying something new is difficult but I already know HPS. Taking a real leap when I can put out 1 or more lb per 600watts hps. Gotta try something new out every once in a while.

  6. No one is going to share actually useful information…if they knew of a special spectrum, we would get a watered down version at double the price vs their in crowd buddies.

  7. They die at a proportionally faster rate…All LED is going to cost slightly more than HPS unless you are a flawless producer.

    I bought 2 different china LED techs…both had a 15-30% fail rate at 12months..my bulbs were the same (about a 10% fail rate at 12 months), but those are replaced far more cheaply and easily. China folk don’t speak English and customer service is in China.

  8. LOL…now, how about a yield and $ value to calculate the time it takes to recover the cost of operation (equipment, rent, time)?

  9. Ya…I always had temps too cool..Even during the summer time.

    Had to keep air circulation down really low. Dehuey use goes up as a consequence.

  10. No it isn’t…HPS has virtually no UV while halides usually produce traces.

    The UVB emissions from a halide is 100x smaller than sunlight…you won’t see plastic go brittle in 1 year under a halide, thats for sure.

    This is just because of the glass they use though, not because HID won’t emit much UVB.

    They do it because UVB usually decreases total yield by 30-50%

    So, what good is 30% more cannabinoids/terpenes at 30-50% less weight? U don’t see any prices that are proportional to the drug content and they are all almost entirely subjective as you can find Blue Dream at 25% for the same price as Gorilla Glue at 18%.

  11. Also be sure to calculate how many more successful harvests it takes to recover the capital cost of the equipment.

    Your looking at 3 years of continuous success to break even on what would be a 1 crop break even with quality HPS equipment.

    The output of the LED must exceed 145 l/w at 80%ppf (lumen measurements include 700-1500nm light).. LED tech has only just met that goal a few years a go. Patents and false scarcity causes the +150 l/w led to cost $5/w when a good HPS equivalent is $0.30-0.60/w.

    I ran LED…I had to use heaters that costed more juice because the LED do not heat the canopy with IR while HPS does….HPS can push growth better at cool temps then LED. LED appear to be better when ambient air temps are +85f.

    Most research I can find on plant growth and spectral composition puts total PPF at the top for yield..The LED only benefits in higher tunability for specific biochemical outcomes (like increasing anthocyannins with 430 and 660).

  12. Thanks for sharing this wonderful blog. I also agree with the author the fact that, it is mandatory to check the period of warranty provided
    by the lighting manufacturer before one goes and buy led bulbs. Also it becomes mandatory to check the reputation of the lighting
    manufacturer, as to check how long they are in the business. Also checking the reviews and returtn policy of the lighting retailer also
    becomes important.

  13. There are also concerns about UVB and THC production, (UVB is abundant in Sunlight and ample in HID, but non-existent in all LED systems except California Lightworks I think) While the exact thresholds of UVB to achieve increases in THC are not yet know, test have shown conclusively that UVB exposure does increase potency and the actual pathway in the plant that connect UVB and THC is now understood. For more info: http://silassativarius.org/2014/10/03/does-exposing-your-plants-to-uvb-increase-thc-production/

  14. my grow room is packed tight with my girls growing under two g8led 900w mega lights. if you have never used it you don’t know what you are missing. resin heaven! i still have my hps setups and use them too but the g8leds have a permanent place in all my grow rooms.

  15. I use COB LED technology at 1200 watts…. I get minimally 1K per plant using LST method. I used to use hps but LED has helped decrease heat….increase yield ….definatelyyy increased trichome production! All over better light penetration with LED!!! Hands down. With hps I was getting about 6-7 ounces dry per plant. Now its off the hook!!!

  16. I call bullshit as well. The proof is in the pudding. I’ll take the Pepsi challenge with my 1000w hps over any led on the market. When led technology is finally perfect it won’t be a fucking secret growers will be screaming it from the rooftops. I’ve tried several different types of led bulbs and they suck!!! You grow larf.

  17. LUSH L E D IS THE SHITTTT!!! Great node spacing on plants! When flipped into flower (or autoflowers) the resin production is phenominal!!! My harvest dry weights have went up significantly also!!! Been usin LUSH for about a year….grew side by side LED & HPS…. LED won out on taste…harvest….trichome production….while using my trim to make hash/edibles….mucchhh more potent!!!

  18. Bought a California Light Works SolarStorm 880. Plants are very healthy but must be turned 180* every couple days to get the back shoots green from yellow, as my plants are all so very thick and bushy. Yeah, they will need major trimming very soon. I also have been adding some light to the far outsides, for four hours a day, using my 1000w & 400w MH. So no chance of failure. Not at this price.


  19. i don’t use cheap LEDs and i get close to 3oz per plant (8plants per light). i also do not keep my LEDs a few inches from the plants, rather I keep them around 3 feet above the top of the plants. I used cheap LEDs before but they give a shitty yield and ended up burning out a few months down the line. i only use top shelf LEDs now and have replaced all my HPS bulbs. get good LEDs and you will be ahead of the curve. it is a more efficient way to grow indoors and is cheaper than growing with HPS bulbs. I save $80/month for each HPS light I changed to LED.

  20. As far as I have been able to ascertain cheap LED’s work just as well as expensive ones. growing methods need changing and anyone wanting large plants should not contemplate the LED route. Their main advantage is they produce so little heat they can be placed inches from the tops of the plants but plants need to be kept small, under 2 foot tall otherwise no growth is achieved below that level. It is also essential to dramatically reduce feeding levels to almost none at all. Water also needs to have all chlorine & fluoride filtered out or it will react badly with the UV spectrum that most LED’s have. They work best with ‘Sea of Green’ (single cola miniature buds) If you want big yields forget LED’s entirely but for a small home setup, they slash electricity & feed costs and do produce excellent results, but only if the light is directly above the plants. If you have a six light X 7 band spectrum measuring approximately 2′ X 18″ that is the max grow area that really works. For big yields & large plants stick with HPS’s or MH’s

  21. I was hoping for something a little more technical like spectrum. Varying the spectrum. etc. Not that the points made aren’t valuable.

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