ComboDrive T8 LED tubes offer maximum flexibility in both technology and application. Choose between single or double ended wiring constructions. You also have the option of using them as a UL Type A LED tube with an instant start ballast, or in a ballast bypass application as a UL Type B tube. Our ComboDrive tubes are fully safety certified for both methods. For the plug and play application the tube can be installed without any changes to the fluorescent ballast wiring. Installation is as simple as switching out the fluorescent tubes with T8 LED tubes. When using this option, should the instant start ballast fail, simply take it out and connect the T8 LED tube directly to the line voltage. This allows you to keep using the same lamp instead of replacing it. For the ballast bypass option, just connect the tube directly to the 120-277V line voltage following the wiring diagrams. They're compatible with most instant start electronic T8 ballasts. Keystone offers replacement lamp holders if needed.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.