The new Maxibright Compact 600w Pro units have an encapsulated choke potted in resin in an injection-moulded enclosure which ensures cool and silent running. They have a 10 year life expectancy and they have a 5 year manufacturers guarantee against ballast failure. Internally they are precision wired to maximise the output of a 600w lamp. The digital intelligent igniter is also timed to protect against lamp failure. The control gear is made by Venture Lighting so quality is guaranteed. The ballast is wall mountable. Available with Euro reflectors with Dual Spectrum Son-T Plus or Metal Halide lamps. Approximate maximum coverage 1.2 x 1.2m. Conventional ballasts rely on simple and basic air vents in the outer case to cool and protect the internal components. The Compact range of encapsulated power packs take advantage of the entire enclosure to dissipate heat from these components resulting in greatly reduced internal temperatures compared to vented power packs. 600w lights are what the grow light industry are based around. They offer the best efficient output possible for growing and flowering plants without the problems of excess heat associated with a 1000w light- which is thus inefficient because a percentage of electricity is producing heat as well as light. Very often a 250w and 400w light lack the punch needed to produce dense flowers unless only one or two plants are being grown.