That is a very good thing if they are working from last 18 years than its the best but here i would like to know for which purpose you are using it and how ? Hope you will not mind answering it. It will be very much helpful to me.
I do have a hydroponics system but the mistake here i made is that the Aquaponics system i didn't created. Both of this system running parallel gives you the best results so if possible than create them both.
The led lights are must for the tomato plants. They are the one which will give the tomato plants the energy replacement of the sunlight. It is essential for each and every plants as the sunlight is required.
You are going on the right direction dude. The led lights will definitely give you the better out put and the crops will also get benefits from that too. It is the time of the led light now and are giving better results than the sunlight.
I have grown up few tomatoes with the help of the hydroponics techniques. I can not say that i have got 100% success but yes i have used the hydroponic technique and they are really tasty too. So giving me the results too.
Well i do not say that i do it but i have a small Hydroponics garden at my home and i am taking care of it on regular basis. It is with led light installed in place of the solar light is it is indoor so required. It is giving me small results and i am thinking to develop it on a big scale too.