I’ve read a lot about the LED grow light and all of the benefits – reduced electricity consumption, lack of heat issues and so on. but what I have not been convinced about reading through hundreds of “my grow” histories on forums, is:


And the only way to quantify if a led grow light will produce more grams per watt than a HID grow lamp is to stop reading and start growing! and for the comparison to work both lighting system need to run with the same environments: genetics(strain),grower,environments and size of the area (to the best of my ability). The two grows both have

  • fans,
  • environmentally controlled extractor,
  • temp and rh meters and
  • a grow area measuring 45cm x 90cm
  • after sexing they will both have 3-4 super autos in 3 gal smart pots grown in a 50/50 coco/perlite soiless mix. The nutrients used will be the same for both systems as and when dictated by the needs of the individual plant.
And obviously they will have the same grower!

The only difference will be the type of light in each room one will be a Fero357 LED grow light and the other will be a 250W HID with a dual spectrum sunmaster bulb. Well done Feroled for believing in your product and providing a grow light for this comparison grow! Day 1-7 no comparison yet On day I placed 20 mi5 super autos and 18 white widow super autos to germinate. (All seeds were kindly subsidised by  Cannabis Seeds – many thanks) and out of a total of 48 seeds I’m pleased to say 45 germinated and developed into 7 day old seedlings



I decided to use the Fero LED grow light to grow all of the seedlings for the first two weeks. as I wanted to see how good the light coverage is.

[notify info]A good way to physically see the coverage of a light is to use a large number of seedlings as a tester: those on the outer limits of the optimum light area will begin to lean towards the light source. because they are young plants you can see the effect within a matter of hours. A good range for the Fero357 seemed to be 60cm x 60cm[/notify]

bear in mind  the actual grow will end up having 3-4 flowering female plants under each grow light.

  • all plants were watered with plain water ph’d to 6.2
  •  the average room temperature is around 23ºC
  • RH 55% (need to work on this)


All plants seem to be doing well.:)

13 thoughts on “Fero357 LED grow light V 250W HID showdown: week 1

  1. Robin Skorepa says:

    An attention-grabbing dialogue is worth comment. I feel that you should write extra on this topic, it may not be a taboo subject however usually people are not enough to talk on such topics. To the next. Cheers

  2. campo cultivator says:

    The Fero357 grow light started the seedlings at about 90cm and over a couple of weeks are now down to about 50cm above the plants.
    I’m sure they could be closer I’m just taking it slow for now as they are both autos andI don’t mind a bit of stretching within reason
    I’ve been playing around with another larger Fero LED over a few autos that are just starting to flower now, and the sweet spot on this 300W draw unit seems to be around 35cm although I think a mature plant may handle a little closer.
    tx for following the blog take a seat :)

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  4. Mckinley Helmen says:

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  5. haemtza says:

    I’m new to Led growing and I’m blown away by the explosive growth exhibited in my plants, so much so that after a month of using onewatt kind xl i ordered 3 more last week.

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