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ya. get those twisted lamps (E27)from philips or osram. Does not require any ballast. Energy saving, especially home use. As for the downlights no doubt you are using 2 x10w lamp you also need to add the power of the ballast which is 5-6watt for each ballast. Adding them all up is to 30watts? Bright enough ? may be consider fluorscent T8 or T5. Thanks

EBE;TLD (from your picture) is meant for T8 lamp only. As for u are using T8 fluorscent tube, u could only use EBE ballast. Not PL lamp. As for PL lamp it works also but have to use a ballast which of PL too. The letter TLD meaning fluorscent tubes (T8) Got it? T5 is not actually brighter , is more efficacy i would say compare to a T8 tube :-)