Full daylight high noon at the equator mid summer on a clear day etc you'll get about 4000 watts of light per square meter, on your tank's area that would be about 800 watts. I'd say as long as you don't go over that you don't have too much light. You have 54 watts.
More practically though, as long as your tank isn't turning green or overheating. You don't have too much light. And that's dependent on water quality.
None of my jagers are accurate, but the visitherms are the worst for it. I don't have any running now to check but I remember them being in the region of +-4 degrees off.
First of all, don't use the temperature scale on the side of the heater thinking that if it says 22° on the heater it will keep the tank at 22°. The scale on the heater is a LIE.
If the tank is too hot turn the heater down. If it's too cold turn it up.
Actually, if you have to ask the question you probably don't have a clue what Steam is. It's a program/site to buy and download games. For example I bought and downloaded Half Life Orange box a couple days ago, cost $30 or something. On Xtra's pro plan if I'd already hit my data limit that download would have cost me $320 in excess data charges.
I doubt there's more than a couple people going through even 1 tb/month. Let alone multiple TBs. Trying as hard as I can I've barely even gotten up to around 150gb.
Annoying... No more fast, cheap unlimited internet...Again.
http://www.stuff.co.nz/business/industries/3716861/Vampires-thwart-Telecom-all-you-can-eat-plan
Yeah, raw frozen prawns work out to about $1.70/100 grams, fish fillets are similar, I see no reason you couldn't grate them up and feed them to fish too. Variety is good. I know mine love them. Well, when I had bigger fish anyway.
And the eheim I had wouldn't even keep running on an empty tank without a weekly cleaning and didn't flow worth a damn anyway.
And my "Daewoo" CF1200s have been more reliable and quieter my fluval 404s ever were, so much that I've thrown the broken non-working 404s in the trash, so I'm not exactly confident of Fluval's reliability either.
It's pretty easy to make a hot wire cutter. Just need a 12v battery and some nichrome wire. Have an old busted heater? The heating element in it is usualy nichrome. Then you just need a couple pieces of wood for handles and a bit of jury rigging it should be all ready to go.
What do you mean by not going? Nothing at all happens when you turn them on? Tubes light up at the ends but don't completely fire? Tubes flicker on and off?