Translation Of LED Fluorescence Lights

[kg5]

Any comments on this selection of LED fluorescence lights would be very much appreciated. Tried to get as much info as I could.

I have ordered a single CREE LED 22w T8 Light tube lamp fluorescent replacement 120cm COOL WARM WHITE.
After I purchased the item "cool" was included in the description.

List:

18w-T8-1.2-Cool-Clear-6000/6500k-1800lm

18w-T8-1.2-Cool-Frosted

22w-T8-1.2-Cool-Clear-6000/6500k-2200lm

22w-T8-1.2-Cool-Frosted

22w-T8-1.2-Warm-Clear-3000/3500k-2200lm

22w-T8-1.2-Warm-Frosted

120w-High Bay-Cool

180w-High Bay-Cool

30w-T8-1.2-Cool-Clear

30w-T8-1.2-Cool-Frosted

[naoki]

Are you talking about this?

T8 Linear Lamps & LED T8 Tube Lights | Cree Lighting

If you click the Documentation tab, the first PDF (Data and Spec Sheet) has the explanation of how to decode the product number (if you can find the model number). It appears that the product you listed seems to be a bit different, but it could be due to the difference in AC voltage.

This is the kind which you lose the energy twice (due to ballast loss and due to the LED driver). But it gives moderate efficiency. Much better than the strip light you used to talk about. It is interesting that this Cree T8 series runs more efficiently (but less total output) with florescent ballasts with lower Ballast Factors.

[kg5]

Thank You naoki for a great link.

I still find searching a mystery tour!

Will the LED light that I have chosen be able to over winter some fresh tube stock in a large fish tank. Which is a single line of tubes?

Very abnormal cold spell here. It has dropped from 20c to 10c overnight. From one week to the next but things will warm again. The orchids are Grammatophyllums. I was hoping for much warmer weather for another 6 weeks.

Grammatophyllums are coping with the outdoors environment which includes full sun at present. It was a very gradual process to do this.

I am thinking of using the light 9pm to 9am for the coldest time of the day.

[naoki]

Originally Posted by kg5

Will the LED light that I have chosen be able to over winter some fresh tube stock in a large fish tank. Which is a single line of tubes?

Sorry, I'm not sure what you mean by "fresh tube stock". Can you explain a bit more? Also how is the light related to over-wintering? Do you mean heat generated by LED?

[kg5]

Yes a very unclear question. Must be a bit to close to it all at present.

I had 2 flasks of Grammatophyllums orchids. They got very large looking inside the flasks so I potted them into tube size plant pots.

1st flask has hardened off really well and can see growth.

2nd flask was just to the stage where the potted orchids in tubes could take partial full sun. But a cold snap 6/8 weeks early and have not seen any growth in these orchids. This has me very worried as we are headed into winter, a mild one but winter.

I already had and used this gro-lite tube to help the orchids harden for an outside position. This light tube has stopped working.

So I looked at the said LED tube and was hoping to help some root growth with this light and hoping for a bit of heat as well to get some fertiliser into the orchids. But I know very little and have the the idea that heat mite be need to come from another source. I am still hopeful the tube light mite offer some heat.

I have a 4 foot aquarium and the 25 orchids potted in tubes and envisage them in a line directly under the light. The light should be hear tomorrow. The light has cost me less than transport cost to get to a light shop.

Thank You for asking naoki. I very much appreciate it!

[naoki]

Oh I see! But I don't have any experience with this group of orchids. I generally try to keep deflasked offspring at the optimum temperature for the first year or so (warm for warm orchids, and cool for cool orchids). If you enclose entire fixture in the aquarium tank, you might get some heat in it, but I don't think that 18W x 1 bulb will make a big difference. How about seedling heat pad or place the tank in a warmer room? Temp. influences many aspects of plant physiology, and 5C difference can sometime make big differences in some orchids as you probably know.

[Subrosa]

I like to keep recently deflasked seedlings in an aquarium with a raised panel of light grid over a few inches of water. By putting a submersible heater in the water I can keep them warmer than room temp and increase the humidity.

[kg5]

Very interesting answers.

I just happen to have a heap of 50w aquarium heaters.

I use them this time of year to get lotus plants to flower as sending the wrong colour lotus plant creates trouble and also helps to build a root system. So I can rig up 4 heaters in 4 corners with water and the rest of the aquarium dry for the plants.

So heating issue totally solved, Big Time Thank You! These orchids are warm growers. Seen them planted in the median strips in the middle of the road in Singapore and will probably be the only full sun orchids I will ever have. They are very strong chaps when it comes to getting them use to full sun. Quickest I have ever seen a plant harden off into sunlight from a, small but glass house.

I have ordered a single CREE LED 240v 22w T8 Light tube lamp fluorescent replacement 120cm COOL WARM WHITE.

My questions are:
Will this light have enough power for my orchids to over winter for their 1st year? Or should I have 2 or 3 lights the same? Or?

I have 25 small orchids potted that will be in a single line under the light tube. 13 orchids are very strong with growth and 12 orchids that are OK but doing nothing and looking vulnerable.

[ALToronto]

A single tube is probably not enough. 22 w over 120 cm might be ok for seedlings if you kept them about 20 cm below the tube. If you want to hang the fixture 40-50 cm above the plants, you will need more tubes.

As for ambient temperature, LED's love it when it's cold. Their biggest enemy is heat, so make sure you have plenty of ventilation in the summer. Once the temps go above 27-28 deg., their life span will be reduced. On the other hand, if you run them at -20, they will literally last forever.

[kg5]

Thank You Very Much To All!!!!

I now have a plan to over winter my seedlings.

Most winter days get 60f to 70f or 20c to 25c so can give them some outdoor time to help them along.

There is a time from about 5am to 8am where it get to its coldest. Mostly 50f to 55f or 10c to 15c in this time mentioned.

Need to get them outside, hot to get the fertiliser into them.

---------- Post added at 03:52 AM ---------- Previous post was at 02:21 AM ----------

So what would happen if I put the CREE LED 240v 22w T8 Light tube fluorescent 120cm COOL WARM WHITE?

Tube 15 cm or 6 inch away from the seedlings?

Tube 10 cm or 4 inch away from the seedlings?

Very interesting!