Two foot and Four foot LED Tube Lamps for fluorescent replacements. Use these bulbs in your warehouse, factory, store, building, garage or inside any T8 fixture. With operating hours over 50,000 hours you will never have to replace your bulb again making this product earth and wallet friendly. Our 4ft T8 LED Bulbs are now triac dimmable, giving you the option of light level and saving additional power when dimmed.