metal halide lights

[lillift]

hey guys, just picked up a 400w MH bulb. Are all MH bulbs the same and good for vegging. How do you find out about spectrums an lumens to know if it is good? I tried a web search but came up empty. The bulb is a Sylvania metalarc pro-tech bt-37.

[Growdude]

All MH are basicly the same and good for vegg, not bad for flower.

[smokybear]

MH are better for veg and HPS is better for flowering. It will do just fine all the way through the grow though. Take care and be safe.

[lillift]

thanks guys, got it for free and will use it thru veg phase!

[trillions of atoms]

^yup n yup

[Joseph James]

Aren't metal arcs different from regular metal halide lights? I dont think that those bulbs are designed for plant growth. I dunno??

[Growdude]

Aren't metal arcs different from regular metal halide lights? I dont think that those bulbs are designed for plant growth. I dunno??

Metal arc is just a trade name for Sylvania, like Multi vapor is for GE.

[Joseph James]

Yeah...I ordered a light from advanced garden suply once, and the bulb blew out in about a month...then they sent me a metal arc bulb.

So metal arc is the same as Metal Halide?

[Growdude]

Yeah...I ordered a light from advanced garden suply once, and the bulb blew out in about a month...then they sent me a metal arc bulb.

So metal arc is the same as Metal Halide?

Yes