LUXRITE 18-Watt 4 ft. Linear T8 LED Tube Light Bulb 3 Color 4000K 5000K 6500K Single and Double End Powered 2340 Lumens (4-Pack) LR34236-4PK - The Home Depot
4 Foot 18 Watt LED T8 Tube Light - Bypass Only (Case of 30) - Only $3.99 Each | eBay
Feit Electric 4 ft. 18-Watt T8 32W Equivalent Cool White (4000K) G13 Linear LED Tube Light Bulb Maintenance Pack (10-Pack) T848/841/LED/MP/10 - The Home Depot