Wiz white light bulb A67 E27 TW max 13 W White light only 2700k to 6500K. Best ever bulb for studing. 13 W spot on . Good lumens - about 1500 lumens. Much better then 9W. 9W is too dark for studing. At the morning I put it on 5500K or 5000 K which improves concentration according to research . In the late evening I put it on 4500K or 4000 K to not reduce melatonin secrerion in the body ( needed for sleep). Before sleep and after studing Input it on 2700K or night mode to relax. This is the only bulb I can do it - all the other companies make 9W or 11W which is to dark for studing . The one thing I love the mosr about the Wiz ( v2) app is the ability to choose white light Kelvin tempIt is a must !!! Every student should have this bulb. RGB is a gymic ; I am using the white light bulb not the RGB.

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Оооу так мило картавите.... Я тоже картавлю но у вас это...