Kit Components: Kit Components: D-Luciferin Steady-Luc Firefly Assay Buffer (Lyophilized) Reconstitution Buffer D-Luciferin Steady-Luc Firefly Assay Buffer (Lyophilized) Reconstitution Buffer Features: Simple: single step homogeneous assay. Glow kinetics: luminescence half life of about 3 hours. Convenient: lyophilized assay buffer for convenient shipping and storage. Economical: save up to 45% compared to other brands. Simple: single step homogeneous assay. Simple: Glow kinetics: luminescence half life of about 3 hours. Glow kinetics: Convenient: lyophilized assay buffer for convenient shipping and storage. Convenient: Economical: save up to 45% compared to other brands. Economical: