What type of bulb is this.

Im growing under cfl bulbs at this moment but was givin this bye my brother and was wondering what type of bulb it is.

It looks like a Metal Halide bulb

Looks like a MH bulb

Just found numbers on the bulb and a search on google says it's an hps bulb.Since it's only 100 watss should i use it or my 4 cfl bulbs.

Depends during which stage your plants are, MH is highly effective for Vegetative phase while HPS is the gold standard for Flowering.. As far as the one in the picture it looks like a mini version of my MH bulb..

im a HID light guy... u cant go wrong with that 100 watt HPS

Whats the difference between MH & HID bulbs? I know what they stand for Id like to know which one is best suited for which job.

mh is a hid bulb so is hps

HID stands for High Intensity Discharge

MH/HPS are both HID

MH= best for vegetative phase

HPS= best for Flowering

HID (High intesity Discharge) = HPS & MH Bulbs

Mundan said:

Im growing under cfl bulbs at this moment but was givin this bye my brother and was wondering what type of bulb it is.

Click to expand...

yes absolutly an HPS lamp.

Color Temperature (CT) - Color temperature, which is measured in Kelvin, indicates whether a lamp has a warm, midrange or cool color appearance. "Warm" light sources have a low color temperature (2000-3000K) and feature more light in the red/orange/yellow range. Light with a higher color temperature (>5000K) features more blue light and is referred to as "cool."

You can veg and flower under either HPS or MH and it will work. The MH does work best for veg and the HPS works best for bloom as already stated and I should add that a mixed spectrum of both during bloom has worked better for me than just HPS.

If you have the ballast and fixture to run that bulb of yours in then go for it.

Thanks everyone for the info.