CFLs typically would be a bit less efficient as they are quite often looped back on themselves and therefore block their own light.
No, but a tube of painted glass can block light.can light block light![]()
No, but a tube of painted glass can block light.
CFLs are typically a rip off in this country but Homebase are doing a pack of 5 x Philips 15watt for €2.68 at moment.