Lighthouse 3kw Fan HeaterThe Lighthouse 3k Fan Heater will heat up your grow space quickly and effectively and for an excellent price! At 3k, it's extremely powerful and can cover larger areas with ease. Its heating elements don't glow, so it won't interrupt light cycles, like other versions out there. At only 49. 95, it's a great little investment for the colder periods of the year and gives you one of the best budget grow room heaters on the market.