Basic LED questions, for starters...

better growth?
Thing about LED is you can produce more of the PAR wavelengths so wasting less lumens. In the table below you can see how traditional lighting (compare your T8's to T5's except they have half as powerful). You produce good Veg(400-520) waste a lot in the middle and have little leaf / flowering / bud growth(610-700).
 

 
Another way LEDs affect growth is you can switch out the LED that is more efficient for the growth you are wanting. In the seedling to maturity stage you want more blue light (vegetation growth) and some red for leaves. When you plant reaches maturity you can swap some of the blue for more red to get more flower/bud/fruit growth.
 
more efficient?
above you can see the efficiency column, per watt the led system is giving more than twice as much usable plant energy. This means you could potentially use 1/2 the amount of lumens to grow the same plant.. makes sense right?
 
also LEDS point straight down with 100-120degree viewing angles at the plants, there is much less light lost and no need to reflect
 
how much?
So to equal your t8 11,200 lumens, half = lumens give or take 
 
IF you build it yourself you can pick the combination of colors u want...
3 cool white x 1 blue 2 red
3 red 3 blue
6 white
 
a 30w driver and 3x10w leds are about 16$ on ebay (x2)
now u need a place to mount it... 8ft aluminum channel is ~ 10$ at my lowes
then u just need a spare power cord to wire the drivers into... free hopefully
some spare wire / solder for connecting the leds ... free hopefully
== 50$ give or take
 
edit: oh and i forgot to mention leds have a running time of 50,000 hours so you won't have to replace them for a long time, where as t8 / t5 have 10,000 running hours. If you calculate that into the price equation as well you can see it's actually cheaper over time.
 
 
disclaimer: this is all theory based, no idea if this world actually work in practice.

Thing about LED is you can produce more of the PAR wavelengths so wasting less lumens. In the table below you can see how traditional lighting (compare your T8's to T5's except they have half as powerful). You produce good Veg(400-520) waste a lot in the middle and have little leaf / flowering / bud growth(610-700).Another way LEDs affect growth is you can switch out the LED that is more efficient for the growth you are wanting. In the seedling to maturity stage you want more blue light (vegetation growth) and some red for leaves. When you plant reaches maturity you can swap some of the blue for more red to get more flower/bud/fruit growth.above you can see the efficiency column, per watt the led system is giving more than twice as much usable plant energy. This means you could potentially use 1/2 the amount of lumens to grow the same plant.. makes sense right?also LEDS point straight down with 100-120degree viewing angles at the plants, there is much less light lost and no need to reflectSo to equal your t8 11,200 lumens, half = lumens give or takeIF you build it yourself you can pick the combination of colors u want...3 cool white x 1 blue 2 red3 red 3 blue6 whitea 30w driver and 3x10w leds are about 16$ on ebay (x2)now u need a place to mount it... 8ft aluminum channel is ~ 10$ at my lowesthen u just need a spare power cord to wire the drivers into... free hopefullysome spare wire / solder for connecting the leds ... free hopefully== 50$ give or takeedit: oh and i forgot to mention leds have a running time of 50,000 hours so you won't have to replace them for a long time, where as t8 / t5 have 10,000 running hours. If you calculate that into the price equation as well you can see it's actually cheaper over time.

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