I had a tornado come through back in April here in Eastern, NC USA and I'm just getting around to rewiring my shop now that's it's back in a verticle position vesus horizonal and spread across a 3-4 mile area. I'm hoping I made the right decision by going with the 4 tube T8 tandem lights instead of the High Bay 250W metal haylides I had. In the old shop I had (4) 250W MH and (3) 4 tube T8 troffer lights. All the old lights were given to me in working order. I'm wondering if my math is right on the lighting to get the best bang for the $$$. I think the 250W MH put out about 20,000 -22,000 Lumens and the T8's put out about 10,000 Lumens each. The MH cost $400 USD each, the T8's are $40 USD each fixture plus $2.50 USD per bulb. So the cost per installed fixture would be $50 USD. Then installing 2 T8 fixtures per MH I had would give me a $100 cost to replace the $400 MH with the T8's. I don't think the power useage for the T8's is too much more than the MH's. I'm using 6500K bulbs in the T8's. I also heard a rumor that the flourocent light bulbs may be going up something like the tune of 400% in the near future here in the States, has anyone heard that rumor and is there anything to it?