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Discussion Starter · #1 ·
In the spirit of being environmentally friendly (and partly because my parents are paying the electricity and i feel guilty running hundreds of watts of lighting) i am wondering how plants grow under regular energy saving bulbs.

I saw cool white lights that emit 100W of light but only require 11W, and warm white bulbs which have similar output. So i am wondering if plants will do well under this because i can light both my tanks much more strongly, while the energy savers total wattage doesnt even add up to 1 of the ballasts that are running my flourescent lights.

Will the colour of the lighting mean that the plants wont grow well. Somebody told me that if you combine warm and cool flourescent lighting you get amazing growth but im not sure. I dont want to spend money buying fittings and globes if im not sure that i will get lots of growth, as well as a nice bright tank, i dont want it to have an orange tint from the warm whites.
 

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Discussion Starter · #3 ·
Well the bulbs i mean are the new screw in ones, as opposed to the tube kind. For example I currently have two 40w tubes in my tank and one 40w in another, so in all its 120w. But according to these new phillips screw in types i can get "up to" 300w of output for only 33w (400 for 40w, etc. etc.)

Even if they dont each output exactly 100w, they are pretty bright little lights. So im sure on the whole i will get at least MORE light than i am currently, with less energy usage. The other question is will my plants be growing better than if i use special tubes meant for plant growth? even if i have say "200w" of output rather than 80w of specific tubes for plants.
 

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Discussion Starter · #5 ·
Oh ok, so if im using a 40w fluorescent tube it is essentially the same of using 40w of the energy saving bulbs, only the light is more evenly distributed?

Does anybody know if there is any truth in the warm/white cool white thing? Or is it just best to use two or three 40w tubes with the blue/red colours (the one that appears purple) and perhaps a regular white fluorescent light for appearance?
 

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Discussion Starter · #7 ·
Ya i have one of the pinkish/purplish bulbs in my tank as well as a cool white fluorescent tube. its been running for about a month (i think) and the plant growth seems to be ok... I am using a soil substrate almost exactly like i used almost a year ago and i had amazing growth especially with a fern/bush looking stem plant. It pretty much died out in my other tank and now that i have moved it to this tank it has grown a very very small amount. My dwarf hygro is growing pretty ok, but nothing impressive. So i dont know if its the lighting or what, or perhaps the plants just havnt had enough time to settle in...?

The tank is 100L, (25 gallon i think?) and the two lights i mentioned before are each 40w. granted to purple one is about a year old.
 

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Discussion Starter · #9 ·
Well currently i am not fertilizing the tank that has the most lighting, it does have DIY co2 injection (but i think the lid of the bottle has a bit of a leak, so i need to sort it out) i was fertilizing the other tank for a while but i stopped when i took off the Co2 and reduced the lighting to 1 tube. I do have Sera fertilizer tablets but im assuming that most nutrients for the roots should be gotten from the soil substrate? also im adding a Potassium Nitrate and Magnesium Sulphate solution to the water on water changes for the higher light tank, but i dont think this has any trace nutrients. Would you recommend using the tabs or another liquid fertilizer?
 
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