Its not like I have an axe to grind. (Im just trying to discuss the poll - not which light is better).
The way the poll is written is not 'what kind of lighting are you using now' - it is "would you ever use metal halide lighting again?". Which means that the 60% of people who answered 'no' - have already used it - and have switched to LED (doesn't it?) Based on the numbers of reviews of fixtures on bulk reef supply the number of reviews for LED lighting systems are at least 10-20 to 1 (i.e. for every 1 MH fixture review - there are many many more LED reviews. I actually view the 2 systems as fairly equivalent besides personal preference
Truth is that anything can happen with those pools, really.
I strongly believe that many people that never used halides could choose "
no, I would not". Yes, they could.
Point is that people change their minds like many did and are now using halides. Those numbers were different 4 years ago.
I was actually surprised with the increased halide numbers to tell the truth!!! I'm so happy for those reefers!!!!
It's a matter of better results, as posted by many. Halides never needed high advertises, upgrades and hypes, like LEDs need.
Large coral farms had good deals with LEDs and changed. Their application is totally different than our home tanks. What a poor comparison.
There are those small scale farmers, actually reefers, that won't change their halides for anything! Why? they will tell you: better healthier and more colorful frags and colonies! Faster growth! Even their skeletons are stronger, because calcification is boosted, and more like those found in wild colonies. In many cases actual quality comes in small scale production. Reefing isn't different.
There is no need to defend purchase when acquiring a halide system. The results are facts and published by users.
Eventually people will understand better halides and/or T5s and it's huge advantages over LEDs for most home applications.
Another thing people need to understand is that the so called "new technology" is present in each type of light we are talking about. Dimmable halide and T5 ballasts are a very good example, improving performance and efficacy.
Is there anything about
quality of light that halides and T5s have that LEDs don't? Yes, and that is the reason for the changes and most important, results (please refer to past posts in this thread!)
It was written here in this thread about the level of reefers and the way it affects on light choices for they reefs. That is so truth! And that comes accompanied to the fact that newbies comes in the hobby with LEDs as the only choice for their first reef due to the huge propaganda and "examples" at their LFSs. Just saying. They don't know better.
Are there people still grabbing the theory of electricity/ chiller/ etc... maybe, but they are starting to realize those money theories aren't true in many cases, specially in the long run. Besides, LED systems are huge expenses and they will need to be changed for one reason or other.
To me the most important aspect of reefing is to have the organisms we keep at their very best. My guide for that is the ocean. There is no light I would choose to resemble the sunlight other than a halide/t5 combo system IMO/E.
I'm not worried about those numbers at all. Everyone does what pleases them. I respect that.
What I liked is to read how happy those guys were with their halides and see the truth exposed simply.
It does come to personal preferences in the end, so that should be taken in consideration and should be respected too.
And all this is in regards to the pool in the long run.

Let's have a great weekend.