Pros: green, effective, cost, heatless
These are the best price point I've found for quality CFL bulbs. Just moved into a new place, and after leaving behind all the CFLs in the old apartment (green it on, etc), and having many new bulbs to replace, purchased two of these cases to get the cost per bulb, with tax, down to $1.71 - not bad. They do flicker a bit when turning on, but I prefer that to the instant blast of light. They emit virtually no heat and can be used in any standard socket.