Comparative Light Shopping

[AnonYMouse]

That's the one!

Update: after two months, all the plants under these lights are doing well. P. tetraspis flowered 3/5 red, a macroclinium has 2 spikes, got enough light to really redden a Neofinetia and a Pluerothallis and all the others are healthy greens.

[AnonYMouse]

I'm reviving this thread.

(This is strictly for growers wanting to use conventional household lighting, have not the resource for fancy growing nor the commitment nor wherewithal for making a superior set up.)

After about a year, I'm finding that the Philips is out performing Ray's. I prefer Ray's flat array design but many plants aren't spiking (placed impractically close, too).

Anyone try any lights other than those previously mentioned?

[naoki]

Here are some measurements which I have accumulated.



A bit difficult to see, but OB doesn't seem to support "table" bbcode.

watt: measured by kill-a-watt
micromol/m^2/s: PPFD measured at 12" distance. I used old, uncalibrated Li-Cor LI-190
fc: footcandles at 12" measured by cheap LX1330B.
PPFD/fc: conversion between PPFD and foot-candle

For the A-type bulbs, I used cheap clip-on reflector (small one, around 6" diameter).

The ones with ** at the end are used bulbs, and others are the measurement from fresh bulbs.

Note that the narrow beam pattern like Cree PAR38 will give high values of PPFD, fc and PPFD/watt because I'm not integrating over the entire area. But PPFD/fc is better with LED than CFL (so ones need to be careful with that kind of comparison with light meter).

[AnonYMouse]

Thanks Naoki!

I'll be checking out a few of those in the coming weeks/months.