LightHouse ECOHEAT 135w Electric Greenhouse Heater 91.5cm This electric greenhouse heater W135 is economical to use and helps to protect plants against sudden temperature change. FREE POSTAGE £33.95 Quantity: at £33.95 each Add To Basket This Lighthouse greenhouse electric heater protects against sudden temperature change. Helps reduce humidity and condensation when growing indoors and so helps protect against fungal attack. 135w heater - is economical to run. IP55 rated, splash and sprinkler resistant. Portable or wall mountable. Also helps reduce humidity and condensation when used indoors. Size - 91.5cm long. 1m cable.