HPS vs. Induction + CFL flowering comparison

[StoneMeadow]

Subscribed...I love science projects.

[vanduction]

The little guys got put in the boxes about a week ago. They had been veg'd from clones, in a shared tray of potting soil, under a mix of bright HPS & MH. They were transferred into individual 6"x6"x7" pots with "supernatural" growing medium:



We like this medium primarily because it prevents overwatering and it's reusable.

Here are the plants after about 5 days:

HPS:



induction:



It may not be obvious from the pictures, but the HPS plants are a bit shorter and a bit darker. Both plans are showing the very beginnings of the buds.

There was a problem however: the temperatures in the cabinets are getting too low, despite the electric blankets:



Minimum temperature: below freezing!! I really hope this has not ruined the experiment. To solve this i installed 1500w electric heaters inside.



Once those were put in, the temperature inside remained consistent between 66f and 72f while the lights were out.

From here until harvest I expect to only post occasional pictures as the plants flower, but if anyone has any questions or suggestions let me know!

[vanduction]

After about 3 weeks the HPS plants are shorter, a bit darker, and have slightly larger buds.

HPS pics:


induction pics:

[TANKJR]

Yep, I like experiments, too! I'm in... :thumbsup:

[vanduction]

Haven't noticed much growth in the past 2 weeks. The good news is the temperature is holding steady: between 64f & 80f. I've bumped the thermostat up to try to keep the temp in the high 60s.

The difference in bud size between the lights is pretty obvious at this point, but we'll have to see if there's a change in the coming weeks.

HPS pics:


Induction pics:

[emilya]

Wooohooo! Controlled Science Experiment! I love it... had to subscribe to see the results. I love the dual cabinets and all sorts of possibilities for them come to mind! Good luck on the grow! --Emmie

[khyberkitsune]

Still putting the cash on HPS.

[budlover13]

Subbed!

[Lynhal]

Gently pushes the other sub'ers over to get a good seat. Science is a blast! :stoned:

[jon420]

I like the fact that someone is trying this experiment but I am a little confused about a couple things. How is this going to be a very accurate study without using the same amout of watts? If you based this study on lumens I believe the CFL's would win because they can be spaced differently than a HOT HPS that just hangs above the plants. (You would however be using more watts in CFL's if you went based on lumens.) I would suggest using the same amount of watts and then trying the experiment again. I am not at all knocking your experiment, Im just not sure how accurate it will be because of the watt difference and the temp problem you had. Good luck and I'll be following your experiment and I hope you do more. We need more documented studies in the growing world.:smokin: