bulb

Hello fellow growers. I have few questions on which i need your opinions 1) i turned my girls into flowering in the end of November, its their 6th week of flowering. ( im using 20 watt led bulbs) in my tent i have 20 20 watt bulbs, out of which 15 is 3000k and 5 is 6500k so i was wondering...

Hey! I’m reading that you should have at least 7500 lumens per sq ft to really take advantage of CO2 enrichment. In a 4x4 area, a 1000w HPS has sufficient lumens (9375 lumens per sq ft) but not a 630w CMH which has less than half as many lumens (4125 lumens per sq ft) even though both lights are...

E27 citizen cob led bulb. Just came across this on amazon. Any thoughts...

Hello All, I've been gone for a while, but back in the game again. Real quick about me: I grow dirt or hydro scrog, and talk in actual watts. I built my box, and had it all figured out except for the lighting. I'm an old CFL guy, but in starting again I want to go LED and build my own COB...

Where on the bulb is the wattage found? I bought a 1000w bulb w/out box and wanted to double-check the wattage before firing it up. I looked at the base of the bulb but didn't find the wattage anywhere. Wtf.

Hello everyone, this is my first post although I've been lurking for quite some time. I live in California and in my area we're looking at 14 hours of sunlight at most around May 10 give or take. Im going to be doing a 20 plant op starting from seedlings in about 20-30 gallon holes each in...

I was wondering if there is a general rule of thumb when it come to bulb/ ballasts compatibility? I know you cant use a CMH bulb in any of my old CH or HPS fixtures. But what about Compatibility between Bulb/ ballasts brand?

I have a new 600w dimmable ballast dimming a used 600w bulb down to 250w for some seedlings I'm starting. I was checking on the seedlings and when I turned around for a minute and turned back around to the tent the light was out. The light stayed out for a couple minutes but then came back on...

I have a dimmable lumatek 400w ballast. I "dim" it to run at 250wSL, using a 400w/430w bulb. My question, is it more efficient to use a 250w bulb instead ?

Today I was really excited to upgrade my bulb to a 250W CFL... immediately after screwing it in and turning it on however, it quickly flickered and went dark, as a burnt out bulb does. On closer inspection some of the white poweder inside was burned away or something, and the glass was...

The Philips bulb comes in a 942 (4000k) and a 930)(3000k) Using them in veg and obviously the 942 is better with more blue but when I was running the 930 they looked alot more robust and generally bigger. I know the increase in blue in the 942 will keep them squat and promote side branching but...

Hey guys I have a few rooms, One of them is 11x13 with 6 Gavita 1000e's and 4 Gavita 270e's I have 12' ceilings but I think the 1000's may be too much, I usually run them at around 750-800. It has been almost 2 years on this setup and have been noticing my yield slightly dropping, I would like...

Currently running a small scrog (60x60) with a 400w Sunmaster dual spectrum bulb. Worth the investment to change over to specific spectrum bulbs for veg and flower - would I get a noticeable difference? Recommended 400w E40 bulb?

Newb question. Got my tent going yesterday. Noticed that the light flickers, is this normal with a CMH bulb?

Alright, here is an embarrassing question. I ordered a kit that was supposed to come with a CMH bulb 4200k for vegging. Nowhere on the bulb does it specify that it is 4200k. With Philips, how can I tell if the bulb is 3100k or 4200k?

Hello, From what i read, to start the flowering stage, it should be good to change the light bulb.. now i have a "Philips Master Son-t PIA Greenpower 600W", and it says it can be used for vegetative and flowering.. having a spectrum of 2050k and 90000 lumen? For which stage should I use it?

I finally pulled the trigger and bought my grow light. Decided to go with a CMH. The unit I got has a vertical bulb in a reflector, but with no glass cover. https://blueearthsustainable.com/grow-light-kits/phantom-cmh-reflector-ballast-and-bulb-kit-4200k-phr31504kt So here is my question. In a...

How long do CMH lamps last compared to HPS?

Hey guys, I'm new here and decided that maybe everyone could post some REALLY GOOD TIPS for first time growing. And I figure other people looking for tips as well could find this. So to start out and keep this brief, one day I got the cool idea to take some seeds from the last of my reggie and...