Personalized Irish Light Long Sleeve T-Shirt. You don't have to be Irish to be green text with the picture of an energy saving light bulb is a funny gift design for the energy conserving on St. Patrick's Day and Celtic events. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL