Conversion bulbs that are Metal Ace are essentially a MH bulb operating on a HPS core and coil ballast.
This bulb features the perfect amount of blue spectral alight and energy which is essential for your vegetative growth cycles. This conversion lamp turns your one dimensional High Pressure Sodium Core and ballast into a highly versatile system for growth throughout Vegetative stage.
The quality is high in these bulbs and they are made in the good old usa. Providing you will a full Hortilux spectrum of light, these bulbs are all tested individually before they even get shipped to you and even feature a friendly 1yr warranty. Guaranteed to be environmentally friendly and made of one hundred percent lead free materials.