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abhis9
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Location: Kolkata, West Bengal, India
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 Posted: Fri Jun 22, 2012 3:49 pm Post subject: Re: It's LED season ! |
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| bhim wrote (View Post):
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20 watts for 4.5 gallons then where can we save power.
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Oops !!
So what will be for 23 gallon tank ! (24"x15"x15")
Also how the LED will be ditributed !! Is like Shelly's 12" Cube fittings !!
I need same light coverage each and every corner of the tank. |
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saikumar
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Joined: Jan 30, 2007
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Location: HYD-is-good
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| Posted: Sat Jun 23, 2012 9:08 am Post subject: Re: It's LED season ! |
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| bhim wrote (View Post):
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20 watts for 4.5 gallons then where can we save power.
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super question  |
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Nidhi
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Joined: Nov 23, 2011
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| Posted: Sat Jun 23, 2012 9:22 am Post subject: Re: It's LED season ! |
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| saikumar wrote (View Post):
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| bhim wrote (View Post):
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20 watts for 4.5 gallons then where can we save power.
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super question
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You may not be saving much on power, but you save on the bulb replacement. you are supposed to change the bulbs like PL-L or CFL every 1 to 1.5 year. but you need not change these LED for 8 - 10 years.. |
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jabba
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Joined: Oct 09, 2011
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Location: hebbal,banglore
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| Posted: Sat Jun 23, 2012 10:07 am Post subject: Re: It's LED season ! |
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| but nidhi price for a 36 watt pll is just 130 but of a 30 watt led of this kind is 1500 so it is not that i think. I dont think you need that much wpg on these leds. But the question is then what is the common rule on which we can decide the number of watts for a tank |
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Madan
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Joined: Jun 29, 2003
Posts: 6988
Location: Bengaluru, India
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| Posted: Sat Jun 23, 2012 10:53 am Post subject: Re: It's LED season ! |
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| jabba wrote (View Post):
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But the question is then what is the common rule on which we can decide the number of watts for a tank
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The more the better !
You can never reproduce sunlight in your tank ! Plants love sunlight !
Our brightest lit tanks receive less light than a secluded shaded area on a cloudy day ! |
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Deba
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Joined: Jul 19, 2007
Posts: 822
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| Posted: Sat Jun 23, 2012 11:21 am Post subject: Re: It's LED season ! |
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| LED is the next big thing in lightening and it has a very bright future for aquarium lovers.....less heat and power requirements.... |
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saikumar
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Joined: Jan 30, 2007
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| Posted: Sat Jun 23, 2012 11:30 am Post subject: Re: It's LED season ! |
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| Deba wrote (View Post):
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.....(1)less heat and (2)power requirements....
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First one agree, 2nd one always been doubting.  |
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Madan
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Joined: Jun 29, 2003
Posts: 6988
Location: Bengaluru, India
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| Posted: Sat Jun 23, 2012 12:37 pm Post subject: Re: It's LED season ! |
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There is a lot of heat from LEDs, you need a heat sink to get it out.
If you see the pic I posted for the 20 watt floodlight, the lower casing is a heat sink !
Luckily the heat can be redirected away upwards with a heat sink !
A 80 watt LED fixture weighs 12 kgs and a 50 watt LED Fixture weighs 6.5 kilos !
The weight is primarily the heat sink ! Wish something lighter is available ! |
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sandeepraghuvanshi
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Joined: Aug 19, 2005
Posts: 4715
Location: Mathura, UP
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| Posted: Sat Jun 23, 2012 4:22 pm Post subject: Re: It's LED season ! |
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| jabba wrote (View Post):
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I dont think you need that much wpg on these leds. But the question is then what is the common rule on which we can decide the number of watts for a tank
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The primary thing is deciding lighting for a planted tank is lumens not watts, as long as we keep on talking about watts we will always get confused.
Watt refers to energy which is being consumed by the bulb/tube.
To put things in perspective,a 20w normal incandescent will give 280 lumen,20w CFl will give 1250 lumens, a 20watt LED will give 2100 lumens.
This is where I think LED score over everything else, watt per watt they give highest illumination.
Also their reflector seems to be of very good quality, which is a added bonus.
I was earlier thinking about in for 36*2 pll reflector fittings, however I could have only 3 such fittings over my tank, now these might be a better option. |
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vidhyasagar99
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| Posted: Sat Jun 23, 2012 5:21 pm Post subject: Re: It's LED season ! |
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| what about dimming i;e does the led weaken after long usage like a year, the plls go dim after long usage,does the same thing happen to leds? |
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saikumar
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Joined: Jan 30, 2007
Posts: 1999
Location: HYD-is-good
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| Posted: Sat Jun 23, 2012 6:08 pm Post subject: Re: It's LED season ! |
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| sandeepraghuvanshi wrote (View Post):
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To put things in perspective,a 20w normal incandescent will give 280 lumen,20w CFl will give 1250 lumens, a 20watt LED will give 2100 lumens.
This is where I think LED score over everything else, watt per watt they give highest illumination..
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Yep youre right.
This is where I think it goes wrong! not all LEDs will have that efficacy, one in topic is at 1800lumens(90lm/W). Not at all bad. But hobbiests can blindly go wrong with choice in local markets/sites when they just hear LED, and there are lower end ones.
Coming to the (fluroscent)T5 philips which gives 80-90lm/W, we still are dealing with low efficiency. http://www.ecat.lighting.philips.com/l/lamps/fluorescent-lamps/tl5/t5-standard/927926086555_na/ |
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Ravinder
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Joined: Jul 19, 2012
Posts: 39
Location: Jaipur(Rajasthan)
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| Posted: Thu Jul 19, 2012 1:10 pm Post subject: Re: It's LED season ! |
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It is not a good idea to use this type of one LED lamp on an Aquarium, LED lights do not have all the wave lengths so it is better to use many small units of bulbs with a ratio of Red, Blue and White LEDs, as far as I know 1/3 of blue and 2/3 of Red is suggested, and the whites are desired to visualise the Aquarium nicely. Many sites suggest that for plants the Red and Blue is required more than other spectrums. I hope you are using only white LEDs for a tank without plants, otherwise it is not desirable. We get many economical Red and Blue LED lamps, modules and strips and they can be fixed many of them on the top of the Aquariums to get good results. I am using the same.
Ravinder Singh
Jaipur |
Last edited by Ravinder on Wed Feb 06, 2013 12:37 pm; edited 2 times in total |
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Madan
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Joined: Jun 29, 2003
Posts: 6988
Location: Bengaluru, India
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| Posted: Thu Jul 19, 2012 1:22 pm Post subject: Re: It's LED season ! |
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| Tank pics please ! |
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josyjames
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Joined: Apr 21, 2010
Posts: 1884
Location: Bangalore-Ramamurthy Nagar
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| Posted: Thu Jul 19, 2012 2:12 pm Post subject: Re: It's LED season ! |
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| Madan wrote (View Post):
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Tank pics please !
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Madan its your tank. You are supposed to post the pics of your led flood light setup.  |
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Madan
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Location: Bengaluru, India
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| Posted: Thu Jul 19, 2012 2:18 pm Post subject: Re: It's LED season ! |
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| Shelly, I was asking for pictures of the tank with Red, Blue, etc., LEDs. |
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