Definity Digital VGRO 38P WFL 120 PAR38 Spectrum Lamp LED Flood Light Bulb for Improved Plant Growth, Red/Blue Excellent PAR output and photosynthetic efficiency No Radiated heat to allow for maximum irradiance at close proximity to plant canopy 40 optical distribution allows for more moderate light levels for most indoor plant applications Lasts an average of 50,000 hours Fits E26 sockets. No tools or apps required