2 Pack of LightWise LWLF24T5HO18R Red LED 18W Tubes with 660nm Red Light and T5 2Ft Retrofit for F24T5HO Replace Fluorescent Tube Directly! Exactly dimension can directly replace T5HO Fluorescent tubes to get better spectrum and fast growing and energy saving for Grow Lights Great for build up a own grow spectrum of grow system with Blue and White tubes for different stages Three times Red with 660nm lightwave length than a regular F24T5HO Fluorescent tube Over 50000 Hours life, 30000 hours or three years warranty UL listed and brown hard paper tube packaging via regular shipping.