Wish List Quick view Save 50% Choose options GrowRite Carbon Fibre Filament Lamp Bulb Growrite Carbon Filament Bulbs High-Efficiency, Long-Life Filament Bulbs for Your Greenhouse Heater Keep your Growrite Greenhouse Heater running at peak efficiency with our high-qu… MSRP: Was: $63.10 Now: $31.55 - $39.50 Compare Choose options Compare