lets do a quick calculation:
Most people pay around 11p per KW hour
6 bulbs either use 300w or 27w
A KW hour with the 300w bulb drain takes only 3.33 hours to use.
1 KW hour with 27w drain takes 37 hours to use.
this in itself sounds impressive.
Go deeper......
Imagine the average kitchen lights are on for 3 hours per day every day, 365 days.
365x3 = 1095 hours per year.
300watt uses 328Kwh per year = £36 per year
27watts uses 29.5 kwh per year = £3.25
so a saving of close to £33 per year.
Bulbs are gonna cost about £7.20 each. 6 of them is £43 plus potential postage.
It'll pay for itself in about 18 months I guess... after that all profit... but..
how long do they last these LED bulbs?