The cost per year for a 1.5W bulb run 3hrs/day for 365 days is 1.5/1000 KW X 1095 hr/yr X $.11/KWH = $.18 /yr not $3.30. Now a 4W bulb would cost 4/1.5 X $.18 = $.48.Where the $3.30 came from, I don't know. Someone needs new batteries in their calculator. Using the same parameters, a 7W bulb would cost 7/1.5 X $.18 = $.84/yr. BTW, MY Philips 7W equivalent bulbs use 1.2W,(not 1.5) and the cost comes out to be $.14 per year as shown on the front of the package.
Only found in Clear. (On the shelf)
You can find the t5 bulb in light bulb section in home depot.
Yes but don't buy these. I purchased 3 packages and 2 out of the six bulbs stopped working within 30 days.