All LED lights are not created equal. Try before you buy! Look for units with less LED units per light – this means they are high-power white lighting LEDs, not just loads of bright white signalling LEDs crammed in. They will also be brighter for a given power consumption.
I also bought the 5W B+Q ones – 4 white LED’s each at 1.25W approx.
Very good colour, though there is a degree of imbalance in the spectrum that makes some colours within the room funky-ish. They do flicker at 50Hz, but if you don’t mind striplights, then you should have no worries.
Highly rated!
As-for when you get your investment back… you work it out based on saved power [45W saved per bulb for me] in KW fractions [ie I saved 9*45W or 450W or .45KW] multiplied by your price per unit [usually in KW/H].
I think for me about 25p/KWH in daytime] – so about 12p/Hour in this flat with all of them on.