Ignitor, Sodium, 250/400W soil The graphite conductivity electrode provides

The graphite conductivity electrode provides greater accuracy because it resists contamination by salt deposits in the sample

HORTILUX Metal Halide provides optimum spectral energy required for vegetative growth

fragrance and flavor production plus the well-known "frosted" look that growers love

rock meal and trace elements

Roots Organics Rain promotes water penetration and aids in the dispersion of foliar applications

Ignitor, Sodium, 250/400W soil The graphite conductivity electrode provides250 400 watt Sodium Ignitor (all ballasts) Ignitors are components inside ballasts. They take power off the transformer and use it to strike the bulb inside the reflector. Replacement ignitors are available in a variety of wattages, brands, and types. Be sure to review item numbers and descriptions carefully before ordering. Contact your Hydrofarm sales representative for help selecting the proper components.