Useful Lumens Directional Lamps verses Non directional Lamp
Sylvania 74081 Semi-Directional LED Bulb, 120 V, 6 W, Medium E26, A19 Lamp, Bright White Light - Walmart.com
Light Efficient Design LED-8017E-G2 20 Watt A Series LED High Output 360 Degree Omni Directional Design Bollard Retrofit Lamp E26 Base 150W Incandescent 100W HID Equivalent
Current Professional Lighting LED12DP30RW93015-120 LED PAR30 Low Glare Directional Lamp, Clear - Incandescent Bulbs - Amazon.com