Just a few minues ago,i have saw a post at this forum,he talked how to choose a better led lights and good price .now i share my ideas at here.
i heard more and more people prefer to use led.and ask about such that questions,does people really don't more informations to led?

if you want to choose a high quality and good price.
i think you should better to look for manufacturer,because manufacturer price always good and distrbitor.
about the high quality,i think you should tell us what's kinds of plants are you keeping?because diffrent palnts need diffrent leds colour.
for aquarium palnts,main colour is blue and white.
on rule,blue is450nm, 460-470nm white is 12000-14000k,18000k,65000k and such.and you should better choose two switch and power cord for you aquarium plants,and independently control colour,that will be perfect.
and about the quality you also need make the leds size,for example,if we use 3w leds for you plants. but there will have some issue.
someone use 3w leds,the led power only 2w,so choose leds do not according to the leds name(3w or 2w),you need according to the leds size to decide what you need!

3w some people are use 35mil,38mil,or 40mil do 3w,that sick!! because is use such that leds size,will be have big problem.

as you know,small leds size will have heat disapation,decide to the led lamps quality heat disapation is the more important reason, so a good quality leds,
42mil,45mil for 3w leds the quality will better,if you need 1w for you fish tank,choose,34-38mil is good.

i heard some people 1w just use 28mil leds,that's cazy,and bad quality,so when you choose you lamps,please attention about that.

and another about the quality is :driver(power supply).
someone should use led aquarium for you fihs tank ,right?
so there i have a question,does you led lights if one led driver bad,the whole of lamp will also can't working?yes,it can't work.
so when we choose a lights we need make sure the driver whether good.
but the market have lots kinds of driver,how can we distinguish
it?dear friend,that's hard for us. so we need looking for whether have a led lights,if one led driver bad,the whole of lamps still working?i heard someone have got such that's lamps,and it's ul standard.

wow,sounds cool,and profession.
i have one pcs 55*3w led aquarium at my home,with 30pcs white and 25pcs blue.
the result is very good.jone,i notice about the lamps that you talked about if one led driver bad,the whole lamps still working,and it's ul.that's awosome.
can you tell me more informations about that?

the lights is low voltage,32-45V DC,very safe,it's a new technical on the market.use modular design,if one modular bad,the whole lamp leds still working!