The ballast compatible tube can safely and easily replace the fluorescent tube of 50w and bring energy-savings of 30w. Thus, a lower utility bill for you every month. This tube can work with ballast and hence the existing fluorescent tube should be taken out and the tube must be put in its place. However, you must ask us for a ballast compatibility list. These tubes are housed in rugged die-cast aluminum for efficient heat dissipation. For the standard ceiling height, these tubes having a beam angle emit enough bright light, have a long lifespan, and have a shatterproof coating, unlike the fluorescent tubes that were of inferior light quality, typically low lifespan and usually with no shatterproof.