Application: For 4ft. Direct Replacement for Conventional 36W tube light fitting/Idel for both home and office , For 2ft. Ideal for compact spaces that nees more spread out light from a smaller light souce Features: For 4ft. 50% more energy Efficient/Unbreakable fire retardance PC body , For 2ft. Light output similar to 4ft Batten/Anodized Aluminum body