Lighting virgin-I need your help!

[michika]

How about I just explain the differences, as I understand them between T5 and MH. Then anyone else can chime in, especially if they know better, or have more information to provide.

MH - Pros
-Heat - May use your heater less
- Lots of Bulb choices and ballasts to choose from, each giving you a different result in color.
- Cheaper then T5s on initial set up in most cases.

MH - Cons
- Heat - May heat your tank up too much.
- Bulb replacement, bulbs must be replaced at least once a year.
- Bulb color, eventually bulb color can shift and your light won't be the same initial color.

T5 Pros
- Bulbs don't change color (so I've heard)
- Replacement cost of bulbs is considerably cheaper (again this may change with each setup)
- Can get the same or equal type of growth as you would get from a MH.
- Less power draw
- May not heat up your tank as much as MHs, although again it depends on how many bulbs and how close to the water they are.
- Bulbs only need replacing about every two years (again, something I heard)

T5 Cons
- Initial set up cost, is up there...
- Need individual reflectors for best light output, so there is more cleaning/maintenance required then just one MH reflector.

Thats about all I've got for you so far...

[scsi]

Originally Posted by michika

How about I just explain the differences, as I understand them between T5 and MH. Then anyone else can chime in, especially if they know better, or have more information to provide.

MH - Pros
-Heat - May use your heater less
- Lots of Bulb choices and ballasts to choose from, each giving you a different result in color.
- Cheaper then T5s on initial set up in most cases.

MH - Cons
- Heat - May heat your tank up too much.
- Bulb replacement, bulbs must be replaced at least once a year.
- Bulb color, eventually bulb color can shift and your light won't be the same initial color.

T5 Pros
- Bulbs don't change color (so I've heard)
- Replacement cost of bulbs is considerably cheaper (again this may change with each setup)
- Can get the same or equal type of growth as you would get from a MH.
- Less power draw
- May not heat up your tank as much as MHs, although again it depends on how many bulbs and how close to the water they are.
- Bulbs only need replacing about every two years (again, something I heard)

T5 Cons
- Initial set up cost, is up there...
- Need individual reflectors for best light output, so there is more cleaning/maintenance required then just one MH reflector.

Thats about all I've got for you so far...

you forgot the cool shimmering effect as a pro for MH's

[michika]

Ah the shimmerine effect, I have to say, that is one of my favorite things!

Oh and the gloriously odd shaped burns they leave when you touch them by accident!

[fencer]

Good summary Catherine
You also can get MH bulbs from none tradition sources. Unlike PC and T5's which you pretty much have to get from the aquarium industry. I am not sure if the longevity of T5 or PC is any better than MH. You forget the more esoteric properties of MH. The water shimmers..okay that sounds goofy but you all know what I mean. I think cost is about the same when you look for package lighting systems. MH ballasts can get very bulky as opposed to PC or T5. Some you can fry eggs on. My money is on using MH, although I am using PC right now. My MH were 6500k but I am switching to 10000k. My PC are 14000k...a little to blue for me. One thing I have to say get a set of moon lights...there nice to look at, although I am not sure if they have any effect on corals. Heat and power consumption are the considerations you should be thinking about.

[scsi]

Originally Posted by fencer

Good summary Catherine. MH ballasts can get very bulky as opposed to PC or T5.

Yeah, I hate that about my Halides..... 2 heavy bricks......

[fishoholic]

We have T5's on our 120g tank downstairs and trust me after a year the bulbs need to be replaced, however the nice thing about the T5's is that it's cheaper to replace the bulbs. We have a 250w HQI MH Hamilton on the 30g tank upstairs and one bulb for it is the same price as the 5 bulbs for the much larger T5 fixture. I have noticed a bit of a difference in coral growth between the two tanks (although all our lps and softies and aneomone are growing quite well with T5 lights) I think the MH provide a bit better growth rate then the T5's and sps and zoos do much better under the MH. On a personal note I love the overall look of the MH way better then the T5's. You wont notice much of a difference (other then the shimmer) between the two lights until you have one of each in your house to compare to, at least that's what I found.

[michika]

Fishoholic,

Do you see any difference in color between your MH & T5s when it comes to SPS? How much of a difference in growth rate would you say there is?

[DanG]

one other thing to take into consideration is that MH light will be very intense right under it and then diminish over distance away from the centre of the bulb, with T5's using individual reflectors, you get the same intensity over the whole length. Plus the ability to run a dusk/dawn effect (assuming you have more than one 2 bulb set of T5's. I've found you just have so much more flexibility when it comes to tuning the colour output of your lights with T5's when you have a multi bulb setup. 6 lights gives you way more options for tuning than 1.

[fishoholic]

Originally Posted by michika

Fishoholic,

Do you see any difference in color between your MH & T5s when it comes to SPS? How much of a difference in growth rate would you say there is?

The SPS have better/brighter colouring under the MH. The growth rate is almost double (if not more) under the MH as well. Keep in mind it is a 250w hqi on a 30g tank and the T5 (36") is now (just replaced the bulbs) 3 mid day and 3 pure atinic on a 120g. I will say though, that when it's just the 3 atinic bulbs on, the tank looks great.