The type of vegetative light output determines the optimum plant growth. Sunmaster manufactures superior High Grade horticultural lamps and is a division of Venture Lighting International. They are known for their 3, 4 and 6 thousand degree Kelvin color temperature lamps. Each class of lamp they manufacture has had the metal halides inside the ark tube modified to burn at specific color temperatures without the need for colored glass or coatings.

Cool

The 6k lamps work well to promote very fast and prolific bushy vegetation. It is good to note that of all the colors in the spectrum, plants need a larger percentage of the blue spectrum to be healthy. This is the color that drives photosynthesis and translocates sugars.

Neutral

The 4k works well for both vegetative and bloom growth.

Warm

The 3k lamp works very well to promote the bloom cycle of plants as it has had the red spectrum output increased dramatically.
The red, orange and yellow colors of the spectrum are hormonal tripping colors. This is to say that when the plant has these electromagnetic wavelengths pass thru the leaves; bloom hormones are produced in the anticipation of the fall and winter seasons.

Position Orientation

Lamps labeled horizontal, base up or universal are position oriented and will give you the highest light output available for their wattage. They are designed to burn in their designated positions only.
Universal lamps may be burned in any position. However, they will be less bright than position oriented lamps with the same wattage.

Conversion Bulbs

Item #	Watts	Kelvin	Rated	Burn	$Price
Metal Halide Conversion Bulbs for HPS Ballasts
SMC1000CU	1000	5K	Cool	universal	112.95
SMC1000US	1000	4K	Neutral	universal	112.95
SMC1000BS	1000	4K	Neutral	base up	112.95
SMC600CU	600	6K	Cool	universal	94.95
SMC400US	400	4K	Neutral	universal	49.95
High Pressure Bulbs for Metal Halide Ballasts
HL67	1000	2K	Warm	.	178.95
HL69	360	2K	Warm	.	88.95
HL66	220	2K	Warm	.	84.95

Note: Shipments made only within continental US, Alaska or Hawaii. Extra shipping charges may apply for Alaska or Hawaii residents. Please email support@hydroponicsfarming.com before ordering.