Potential major adverse effects of flicker identified in published research and/or Expert Opinion includes these five factors: Photoepilepsy or flashing-light-induced seizure. Stroboscopic effect and associated apparent slowing or stoppage of rotating machinery. Migraine or severe paroxysmal headache is often associated with nausea and visual disturbances. Increased repetitive behavior among persons with autism. Asthenopia, including eyestrain, fatigue, blurred vision, conventional headache, and decreased performance on sight-related tasks. What Colour Temperature Should I Choose? How to Determine How Many Lumens You’ll Need to Properly Light Your Space? SANSI 60W Equivalent A15 LED Light Bulb,6 Pack 900 Lumens Light Bulb with Ceramic Technology,5000K Daylight Non-Dimmable, 25,000 Hours Lifetime, E26, Efficient & Safe 9W Energy Saving for Home Lighting 💡 Bright & Efficient: Compared with other LED bulbs, SANSI's highly efficient E26 light bulbs can provide 900 lumens using only 9 watts of power, equivalent to 60W incandescent bulbs. Based on 3 hours per day usage, save up to 87% electricity, annual estimated cost $1. 💡 Patented Ceramic technology: SANSI's patented technology replaces the traditional Mcpcb the aluminum substrate with a non-conductive ceramic heat sink, directly soldering the LED chip on the ceramic heat sink, effectively reducing the system thermal resistance between the LED PN junction and the surface of the heat sink, resulting in faster heat conduction and higher product reliability, making SANSI's bulbs perform with higher light efficiency. 💡 Flicker-Free: Adopting high light transmission optical lenses, up to 17 LED chips can not only provide you and your family with the light source they need daily but also provide a healthy living or work environment. No flickering, no noise. 💡 Safe and Reliable: The lamp body is made of special ceramic material and the flame retardant grade reaches grade V0; the reinforced insulation structure means no risk of electric shock, its safer; the whole shell material reaches the WF2 anti-corrosion grade, which is more reliable and durable; The hollow design is good for heat dissipation. 💡 Guarantees: ETL listed, quality and safety verified, 22.5 years LED bulb lifespan, 5 years warranty. 13W 5000K 17W Dimmable 5000K 22W 5000K 27W 5000K 27W Dimmable 5000K Lumen 1600 2500 3000 4000 4000 Incandescent Equivalent (Watts) 100W 150W 200W 250W 250W Bulb Size A19 A19 A21 A21 A21 Dimmable - ✓ - - ✓ Color Temperature 5000K 5000K 5000K 5000K 5000K Certification ETL/RoHS ETL/RoHS ETL/RoHS ETL/RoHS ETL/RoHS Lifespan (Years) 22.5 22.5 22.5 22.5 22.5 Package 4-Pack 1-Pack 2-Pack 2-Pack 2-Pack On Dec-30-21 at 18:13:35 PST, seller added the following information:

SANSI 60W Equiv A15 LED Light Bulbs 9W 900Lumens 5000K Daylight Lamp 2/4/6PACK / Options 9W 5000K A15 -- 2packs