Home Depot offers the Philips 4-Foot T8 17-watt Cool White Linear LED Light Bulb 10-Pack for $49.16 with free shipping. That's $10 below our October mention and the lowest price we've seen. (It's the best deal now by $14.) This mercury-free bulb features 2,100 lumens of brightness and a purported lifespan of 33 years. Deal ends May 31.