My one worry here is that CFLs create a higher inductive load on the mains power, and therefore a considerable phase difference occurs for the Voltage and Current in the circuit to which the CFL is connected. Many high-tech sites (such as University Campuses, Eng Facilities) experience this problem already thanks to the PSUs supplied with most desktop computers, and this "voltage lag" can result in firms in this sector paying higher than expected power bills. (Power is sold in kWh for domestic, while industry pays for "kVAh" -- thus phase diff. results in inflated charges). One solution to this problem is for each firm to place a large capacitor somewhere near their sub-station, but this can be expensive, prohibitively so for a startup/SME firm. Was wondering if any EEng's out there would be able to fill me in on the implications of a change to CFLs to the power sector. Would there need to be a drastic change in the way power is delivered, or would it only be a problem (potentially) for the end-user? Cheers, Rich