Home | Community | Message Board

World Seed Supply
This site includes paid links. Please support our sponsors.


Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!

Shop: PhytoExtractum Kratom Powder for Sale   North Spore North Spore Mushroom Grow Kits & Cultivation Supplies   Bridgetown Botanicals CBD Concentrates   Original Sensible Seeds Bulk Cannabis Seeds

Jump to first unread post Pages: 1
OfflineKryptos
Stranger
 User Gallery
Registered: 11/01/14
Posts: 12,258
Last seen: 10 hours, 52 minutes
Re: Question about Grow Light and Wattage. [Re: Blipstir]
    #28504989 - 10/15/23 12:09 AM (3 months, 11 days ago)

Wattage is referring to two things: power and radiant flux. Radiant flux is the sum of all electromagnetic radiation coming off of an object. Which is technically also power, but in a different form. Electromagnetic radiation, instead of electron flow.

For incandescent lights, this is very simple. A filament converts power to radiant flux using resistance. Electron flow becomes heat+light+other em radiation, which is radiant flux.

Since filament performance was pretty universal, you could use wattage to accurately estimate light output.

However, with the discovery of other forms of light, like, for example, LED, things changed. An LED is much more "efficient" (if the goal is light, an LED is a terrible source of heat compared to a filament), and gives off more of certain types of electromagnetic radiation, and less of others. So, less heat, more light.

So, they came up with a new unit, the lumen. Lumens measure luminous flux, i.e. only the visible light band of the EM spectrum. Useful for lights, since that's the point of a light.

But the old system still kinda stuck around. Like how you can go to the store and buy a "60W" LED, which actually pulls like, 9W of power, but gives off the same luminous flux as a 60W incandescent would have. Technically this should be expressed in lumens, but old habits due hard.

So, I'm guessing your 1000w bulb that consumes 100w is giving off the light equivalent of a 1000W incandescent bulb, but only using 100W of actual power.

This is somewhat oversimplified to the point of probably not being 100% correct.


Extras: Unfilter Print Post Top
OfflineKryptos
Stranger
 User Gallery
Registered: 11/01/14
Posts: 12,258
Last seen: 10 hours, 52 minutes
Re: Question about Grow Light and Wattage. [Re: koraks]
    #28505580 - 10/15/23 01:47 PM (3 months, 11 days ago)

Quote:

koraks said:
So there's really no quick & dirty way to equate X Watts of LED power to Y Watts of some other form of lighting.




I mean...Watts is the "quick and dirty" way--because Watts can be used to measure the electromagnetic flux coming off a bulb.

To go back to my example of incandescent vs. LED bulb--filament are extremely efficient at converting electrical power to blackbody radiation, which is also a form of power. But it's very non-specific. So, 60W incandescent is giving off like, 50W IR and lower energy flux, 9W visible flux, and maybe 1W high energy wavelength flux. A 60W "equivalent" LED consumes 9W electricity and gives off 9W visible flux.

Hence, to the "quick and dirty" measurement of visual comparison, a 9W LED is the same as a 60W bulb.

But you're correct in that this breaks down for grow lights and such, since plants don't use human visual spectra.

(pretty sure we're saying the same thing in various ways with varying amounts of detail, but that's okay because this discussion is meant to...illuminate...the subject for anybody that's passing by with a question!)


Extras: Unfilter Print Post Top
Jump to top Pages: 1

Shop: PhytoExtractum Kratom Powder for Sale   North Spore North Spore Mushroom Grow Kits & Cultivation Supplies   Bridgetown Botanicals CBD Concentrates   Original Sensible Seeds Bulk Cannabis Seeds


Similar ThreadsPosterViewsRepliesLast post
* question about cable modem w/router youtelephonecall 1,456 3 10/25/02 04:16 AM
by Ythan
* Post deleted by Moe Howard
( 1 2 all )
therewatchingme 3,688 23 08/09/02 07:18 AM
by TeKHeAD009
* Lana? A question concerning security/basic law. anonymoushate 1,287 3 05/24/02 05:38 AM
by Lana
* IP questions
( 1 2 all )
Zen Peddler 3,626 20 09/20/02 01:41 PM
by llib
* man...wtf...computer question Cubieman420 1,846 16 07/28/03 10:29 AM
by wingnutx
* dumb IP address question Agent Cooper 1,602 5 02/28/02 10:52 PM
by MickyFinn
* Computer volume question superpimp 870 4 08/08/03 10:21 PM
by wingnutx
* Grow Rating Program teonacatl 961 3 08/06/03 09:03 AM
by teonacatl

Extra information
You cannot start new topics / You cannot reply to topics
HTML is disabled / BBCode is enabled
Moderator: trendal, automan, Northerner
525 topic views. 0 members, 0 guests and 2 web crawlers are browsing this forum.
[ Show Images Only | Sort by Score | Print Topic ]
Search this thread:

Copyright 1997-2024 Mind Media. Some rights reserved.

Generated in 0.024 seconds spending 0.007 seconds on 17 queries.