Metal halides, all else being equal they are my favorite. Because replacement bulb costs and heat, are issues in real life, and ramping for sunrise and sunset is important to me, I had to compromise my halide Puritanism. I am a kessil fanboy now. Closest thing to halides that I have seen. The new Red Sea lights are a close third but again they are missing some
je ne sais quoi, of the halides, even more than the kessils. That being said it’s hard to justify the cost difference were I to buy new leds today.
I vehemently dislike the disco ball effect from the radions, and AI lights. The color blending is subpar, adding a diffuser after the fact seems silly, if the light needs a diffuser than it should be built to give a diffuse spread out light source, not in small pucks. of course this is all aesthetic opinion, lots of really nice tanks are run on radions and AI lights.
I would be really interested in trying some of the larger orphec point sources if I have a large enough tank and the cash to pony up, but I can’t say I have an opinion on them for better or worse.
For wider tanks I do like T5 LED hybrid setups I haven’t found a LED which faithfully replaces the type of diffused light from a T5 bulb. Though I think some of the ones mentioned by others, reef brights and orphec strips, are getting close.
Not going to beat around the bush: In my opinion and experience the current lights are awful for a reef. They have a horrible disco ball effect and seem to slowly kill corals. (This is not a slight on anyone specifically, just a statement of my experience looking at lots of tanks and build threads, and with the current lights on my own and customer tanks. If you have an enviable tank that has been running these long term I would love to be proven wrong, and it’s easy to do, just post your build thread or full tank shots showing coral growth and progress. I’m far from an authority on lights, nice current lit tanks may be out there, just never seen one truly successful long term with them. If they actually worked well they are at a good price point) Fine lights for a fish only or a freshwater tank it seems. The current pro I got is the equipment purchase I most regret. I use it only as a moon light now. was inadequate for a tiny coral tank, or even a fuge light in my opinion. While working at a fish store, I hated when my boss would load promises on them and sell them to beginners. Then a few months later customers would come back complaining about how they were struggling with corals. If you are running them and happy with your results then that’s all that matters. I would love to see successful long term coral growth with anyone’s lights. And want to thank those that have already shared theirs with other lighting systems.
The progression of my tank on kessils can be seen in this post of my build thread.
lighting is largely personal preference; there are many paths to successful lighting. I strongly reccomend going to some local fish stores or friends and looking at tanks with different types of lights. Even on the forums look at build threads of tanks you want to emulate and look at their lighting. Ask people why they chose the lights they had, and if they dislike things about them. Go with the ones you like the look of most, that are known to have consistent good results for others. If you like the look, and they work for others, it can be worth figuring out how to make it work for you. lights can have a huge impact on tank aesthetics, and coral growth.