T5 ballast

[BigJon]

Hi, I need to replace a T5 ballast which controls 2 x 45w T5 lamps.
These are for aquarium lamps so they are an odd size from the norm.
Would a 2 x 49w ballast be ok with a difference of 4watts?
Was also thinking of wiring the 2 lamps individually with 1 x 49w ballasts, just what ever worked out cheaper as there are various ones on Ebay.
This is what I have just now that needs replaced.



Thanks for any help.

 

[ban-all-sheds]

Subject to correction by someone who knows, I'd be very surprised if that difference mattered - it's probably not far off manufacturing tolerances anyway.

 

[BigJon]

Thanks BAS, I was hoping I would get away with it but was waiting for someone with more knowledge than me!

 

[Iggifer]

Yea if your choke was underrated I would be more concerned but I think you'll be fine with +4w

 

[Aragorn84]

I use one of these on my aquarium lights:

http://www.lampspecs.co.uk/Lighting...249-Performa-2-High-Frequency-Ballast-Philips

Works well, though mines a 39w model.