That is the same question we all ask ourselves, Is this the light I want long term ? MH and HPS are great lights for growing. There are different things about both lights that some of us like the MH/HPS and some of us are hardcore LED. I have used more LED than HPS and am happy with them. They both work. Take some time now to research both types of lights to get what you really want.
Robert’s free on-line Growing Marijuana E-book has a huge amount of information in it. It is a great place to start.
Another thing you might want to use for starting out is a Support ticket. You will not need to fill it out now but it will give you a great checklist for things to look at for your grow.
This is it:
ILGM Support Ticket:
What is the strain and type(unknown bag seed, strain name, regular seeds, feminized seeds, auto-flower, etc)?
Indoor or Outdoor? If outdoor, planted in ground or in a container?
Size of space (max height and area, length/width)?
Soil or Hydro? Type of Medium used? System type?
pH? Of the soil or medium (root zone/reservoir/run-off) and of the water and/or nutrient mix that is fed to the plant?
Type and strength of nutrients used? NPK? EC/TDS/PPM levels? Of what you feed it as well as what is in the water by itself and in the soil/medium (run-off), or reservoir.
Temperature? Day vs. night temp or highest and lowest temps? Root zone temps?
Humidity %? Day vs. night
Ventilation system? Size? CFM? CO2? AC, Humidifier, De-humidifier?
Number “weeks/days” from into Season, Vegetative Growth or Bloom/flowering?
Add anything else you feel would help us give you a most informed answer. Feel free to elaborate, but try to be brief and to the point. Short and to the point questions and/or facts will help us help you
This will give you a reference on what you might need to address. If you ask grow questions once you get started, it helps us all a lot to have these questions answered.
Of all the things on the list, pH measurement is most likely the thing that will give you the most problems. There are some excellent pH meters and PPM/TDS meters on E-bay and Amazon for low prices. Good Luck and do not be afraid to ask questions. We all started asking questions. Jerry