MH/T5 Advice needed

[AmberSunrise]

Light pros please help!

Is 346W lighting to much for a 27g tank?

I like the idea of having separate controlling ability for the T5s which I will use for dawn/dusk lighting but even if I dont use them all at once the MH is 250W which is 9.25 watts per gallon (I think) over my tank, is that to muchor is my math wrong?

Odyssea 24" 346W Metal Halide System Advance Plus

1x External Quick Connect 250W Electronic HQI Metal Halide Ballast
2x Internal Twin Output T5 Electronic Ballast
4x Power Switch on Fixture (2 for T5, 1 for LED, and 1 for Cooling Fan)
1x Power Switch on HQI Ballast
2x Power Cord (1 for HQI and 1 for T5)
Non-Corrosive Powder Coated Aluminum Housing
1x Built In Heavy Duty Cooling Fan
Glass Cover for HQI
Acrylic Lens for T5
Highly Polished Reflector
Set of Mounting Leg

 

[MushroomXombies]

346w is overkill for 27 gallons.. Plus it might heat your tank up.What type of corals are planning to keep? That will give you a better idea of how much light you need. I would go with a 4 bulb T-5 fixture with some ATI bulbs.

 

[dcantucson]

It is certainly a lot. Most corals can be acclimated to that much lighting however you'd have to watch out not to bleach them. It might be more trouble than it's worth. You're also going to have the heat issue. Have you looked at a fixture with just T5s?

 

[BL1]

I think if you could find a similar fixture to that with only a 150w MH you'd be much better off.