Metal halide lamps use sodium in their arc tubes to give them comparatively high light output. The arc tubes also have other
metals or chemicals mixed with the sodium to balance and improve color. In fact, these lamps have become the standard for lighting sports for TV. Their lives are shorter than those of mercury lamps; but, they are significantly more efficient. You cannot use a
mercury ballast with a metal halide lamp. The power supplied by a mercury ballast for starting and for cycling is different from the metal halides requirements and the mismatch can cause explosive failure of the metal halide lamp. Metal halide bulbs must be run using matching
metal halide ballasts.
High pressure sodium (HPS) lamps generate light with a sodium
(primarily) arc discharge. This gives them the highest luminousm efficacy (lumens of light per watt of energy used) of these three
lamps (over twice that of mercury). Their average rated life is similar to that of mercury lamps.James's ballast products represent many years of experience in ballast design and manufacturing. JAMES offers ballasts for all HID lighting sources including standard and pulse start metal halide lamps and high pressure sodium (HPS) lamps.
EMAIL US
SKYPE